Switching to Nikon from Canon?

Okay So after a lot of thought and research I've decided to Switch over to Nikon

I currently have a Rebel XS Kit Lens, 50 1.8 and I had a few others but sold them to fund the switch.

I currently have a little less then 3k to spend

I was thinking of buying D700+24-70 2.8 or 70-200 2.8 VR I
or buy 24-70 2.8+70-200 2.8 VR I and Buy a D40 or D90 til I can afford a D700 or 800 or wait till D600 is released.

I do plan on Keeping the rebel Xs or Should I sell it so I can afford a better camera.

Added (1). @Andrew Where in my question did I say I took lousy photos with my Canon? I'm switching out of preference and what would better suit my needs. I will probably keep the Canon as well, And I'm well funded to make the switch. So Please be helpful and not a useless Jackass Troll.

Wait till D600 Is Realesed

If you took lousy photos with a working Canon, you'll take lousy photos with a Nikon.

Congratulations, you've just sold perfectly adequate kit and are about to bankrupt yourself to get a new camera which will have you blaming it because you can't shoot.

You're finding out, the hard way, why only a fool changes systems.

If you are switching to a Nikon system, there's no reason to keep the Canon camera and lenses.

Some poor student would love to have it and would give you a little more money in your pocket.

While changing camera brands is not usually a good idea, you need to make sure that what you are doing is a good business decision (although you may not be in business).

IF the Nikon system provides you with unique advantages (my guess is due to its better sensor performance in low light) and you can afford the cost of the lenses you will be replacing, then go ahead and do it.

Spend some more time deciding which camera/lens combinations you need for the subjects you tend to shoot and then buy the best camera you can afford. This may be the new D600 or D800. Only time will tell when you can hold both in your hands and take some test shots using one of the lenses you propose to buy.

Again, take your time. My guess is that you bough Canon gear not based upon performance, but on price and popularity as you perceived it.

If your goal is sensor performance and availability of the lenses you will need in the future, then make your choices and be prepared to stick with them for the next few decades. Buying a camera system is like getting married to it. Making a change later can cost you a lot, much like a divorce.

You can wait for the next camera for the rest of your life. If you want to switch, switch.

I shoot with a Nikon D7000. Although it is a crop sensor lens, it does exactly what I need. I'm an architectural photographer, and I shoot about 5 properties a week. I wouldn't buy a crop sensor camera and then move up to full frame. If you want full frame, buy it to start.