Best way to switch over to Canon from Nikon?

I'm not 100% sure on switching to Canon… This is a very long term thing. I have no reason to switch immediately.

My original plan was to start buying Canon lenses, and buy a mount adapter so I can use it with my Nikon D5000 until I buy a Canon body (if that happens).

And now I'm realizing that Canon lenses are more expensive? (At least from looking for a 35mm f/1.8 or faster) So I'm thinking of buying a Nikon lens and buy an adapter in the future for my possible Canon camera.

Any advice? Are adapters worth the trouble? Do the Nikon lenses, not adapter, depend on which type of Canon body I'm planning to get? Thanks in advance!

Added (1). I'm in the film industry and Canon 5Ds are the standard HDSLR for small shoots. I want to get accustomed to their interface even though I love Nikon. I have no intention to get rid of my current camera either. Would you be able to answer any of my questions?

My question why switch to Canon do you think it will give better images, it will not.

No reason to switch at all.

Have you used or seen the new Nikon D800?

It can shoot uncompressed video in Full HD, can stream via the HDMI connection.

The cost of supporting two camera systems can be like being a bigamist in cost alone.

As you know, but the time you buy all the accessories necessary to make a 5D, Mark III into a viable video camera, you could own a Panasonic AG-HPX255 with three sensors and all the standard features we expect from a professional video camera

* Genlock,
* built-in SMPTE time-code generator/reader
* zebra display
* color bar
* seven-mode selectable gamma
* 4-position and optical filter controls
* 10 bit, 4:2:2 full sample images
* HDSDI
* HDMI

You have to ask a very simple question:
What can Canon cameras do that Nikons can't.
I'm not sure that there's anything!

Stick with Nikon - no reason to change.

If you must change then don't sit on the fence. Sell all your Nikon gear and buy straight into Canon.

I shoot Sony Alpha, so fairly unbiased opinion here, Canon is a step backward. Their image sensors aren't keeping up with Sony's image sensors. Yes all the Nikons use Sony image sensors, and they are crushing Canon in dynamic range, color, and noise at high ISO.

So if you feel the need to do this for work, go for it, but Canon isn't being used because it's the best. As for adapters, yes they will work, but you will run into problems, like being able to control your aperture, no EXIF data, no auto focus, they won't work anything like native lenses, so you might have to bite the bullet and buy the proper lenses for your body.

The newest Nikon D600 and Sony A99 prove once again that Canon is falling behind. I've downloaded RAW files for both, and they have the edge over even Canon's new 5D Mark III.

I don't know much about this since I don't do video but I find it ridiculous that the industry standard for short films is a digital SLR. That is how I understood what you wrote.

Then I find it ridiculous again why you would insist on following a popular brand after having established yourself with an equally potent brand. I don't see the reason to cross-over. You have all the reasons to stick to Nikon. Why force yourself into Canon?

Whether the Canon line offers something better for your wants than Nikon, I won't speculate. However, I don't think it's a good idea to buy Canon lenses far in advance of having a Canon body. The Canon EOS mount is wider than the Nikon F mount. Nikon lenses can be adapted to Canon bodies, but you can't adapt a Canon lens to a Nikon body. If you buy a lens awaiting a body, maybe it will turn out to be great, and maybe it will be a disappointment. If it is the latter, you have missed the opportunity to use the store return policy.

So concentrate on proving them wrong.

Changing systems is expensive, unnecessary and stupid.