Nikon Vs Canon DSLR Camera?

Looking to get a DSLR camera. Not sure whether to get a Nikon or a Canon (Or any other nice brand) Whether one of them is better or if it just depends on how you like the camera. I'm willing to spend about 700 hundred dollars. I just recently started selling my photographs and feel it's time to upgrade.
Any info would be appreciated.
Thank you!

Added (1). No one is forced to answer questions btw. Just thought I'd throw that out there.
Answer if you'd like.

This question gets asked here ten times a day. Please use the search feature to read all the answers already given.

Nikon and Canon are the two top brands in non professional world and within your price range, to get into a professional camera the cost will go way up.

Nikon has one issue that would make me not use it, it is not as versatile as the Canon with lenses.

One big difference between the Rebel T3 and the Nikon D3100 is that the Nikon D3100 is NOT 100% backwards-compatible with older Nikon lenses - while the Rebel T3 works just fine with a large number of Canon and third-party lenses.

Here is a link comparing them side by side for your use.

"… Just how you like the camera… " Exactly!

The last one to answer gave a totally pointless information about the famous "incompatibility" of Canon lenses. He said EF-S lens won't work on Full frame bodies. Right. EF-S is made for crop bodies why would you need to get them on a full frame anyway. The thing he didn't say is that the DX lenses of Nikon won't work on FX bodies too. All the manufacturers make specific lens for specific types of body. It's nothing new.

Get yourself a camera you like working with. Never buy this much expensive cameras without trying them out yourself. Buy them from a local shop.

Nikons are great and Canons are great too. For the money, Pentax is unbeatable. So it all comes down to your personal choice and the one that feels best on your hand.

Don't get a very pricey body and get a lens with the leftover money. You see, the first lens you get determines which company you'll be sticking to. As it is your first SLR, get a cheap one. Pentax K-r is awesome. Many don't like Pentax. (No idea why) Nikon? D3100 it is and in case of canon, get a Rebel T1i. They are amazing cameras and now that T2i and T3i is out, you'll get T1i very cheap.

Both Nikon and Canon has over 160 lenses to choose from. No worries there, you won't even be using 1/10 of that. Pentax on the other hand doesn't make lots of lenses but there DA star line is very good quality ones!

For beginners, all round lenses are the best.

Nikon D3100
Canon Rebel T1i or T2i if budget allows
Pentax K-x or K-r if budget allows

Canon EOS T3, T2i, Nikon D3100 and Pentax K-r would be the best.

And what would you like to see from the camera?

Here's a DSLR Buying Guide - http://www.the-dslr-photographer.com/2009/11/which-dslr-to-buy/

The statement above about Nikon not being as compatible with lenses is disingenuous.

While it is true that Nikon's entry level cameras such as the Nikon D3100 will not autofocus many older lenses, it will work (and manually focus) with almost all lenses Nikon has made in the last 50 years. Since many of those lenses are manually focused anyway, they are fully compatible.

And with Nikon's mid range cameras; the D90 and above, they will autofocus perfectly with the older AF lenses. Only the entry level cameras lack the focus ability for the older lenses.

You might wonder why Nikon did this, but it is partly cost, and partly due to the person buying an entry level camera may not have the need nor desire to purchase the older lenses.

In contrast, Canon is the camera brand famous for lens incompatibility. Virtually no older Canon lenses will work on any of Canon's DSLRs - namely FD lenses. Only EF lenses will work. That fact alone means that Nikon users have access to millions of more lenses than do Canon users.

And if you have a brand new EF-S Canon lens and decide to upgrade to a full frame Canon body, guess what - the lens will not work, even though it is a brand new lens.

And contrary to popular belief, Nikon actually makes more lenses than does Canon. Nikon has 73 lenses in their current catalog while Canon has 68.

So let's keep the discussion on the facts, not innuendo.

Edit:

To the below poster. DX lenses do indeed work on Nikon FX bodies as FX cameras shift into DX mode when mounting a DX lens. Automatic, seamless, compatible.

The reason you might want to mount a DX lens is if you are upgrading and you have several DX lenses and can only afford to replace them one at a time.

Canon EF-S lenses on the other hand have a pin on the back of the lens so you can't mount them on a Canon full frame camera, as the mirror will smack the back of the lens otherwise.

Get your facts straight.