Sounds like a good plan to me. My upgrade path for bodies stops at 7D, or whatever its micro-adjusting, magnesium-built, weather-sealed, fast-autofocusing, crop-sensored equivalent is in about 2 years.
The plan that's evolved as a cheaper 5D3 solution for me is this:
1. Replace the T2i with a new 7D.
2. Upgrade (my interpretation) my walkaround lens from the 15-85mm to a 17-55mm.
3. Upgrade my 70-200 f/4.0L to a 70-200 f/4.0L IS.
4. Get a 10-22mm for the wide side.
Good luck with the 7D.
I guess it all depends on what you want....and what your disposable income level is.
The 5D Mark III, is going to be my first DSLR. I'm going to get the kit, and likely one prime and bang for the buck I think I'm going to get the Canon 85mm 1.8. It is reportedly a fast lens, and quite sharp.
I have from my old, old old Nikon FA film camera, a 50mm lens that I'm going to use on the new camera with an adapter...mostly for video.
I figure I'd like to jump in with both feet to photography....still and video, and bang for the buck, with longevity, this is the way to go. I'm looking to likely get it from crutch field....that way, no taxes (saving about 10%), and they have the rewards thing, so that is about $280 extra I'll get back..likely that will go towards a battery grip. That and 12 mo no interest financing......so, to me, hard camera to pass up.
I've just been one of those to where when I want do to something that involves hardware, I'd rather save, and get the best I can at the limit I can afford.
Prior to getting the camera, I bought a macbook pro loaded....something to use to work on images. I'm going to get the camera, lens...and I think to start with, Apeture and FCPX will set me up for a few years to go. While I can buy the camera outright...why not take advantage of the 12mo no interest? I'll likely drop about $1700 right off, just to keep monthlies more friendly at a bit over $320 or so...and in a year, it'll be paid in full, and I'll start hunting a couple more high end, L level bits of glass. I plan to start with some wide angle stuff.
Anyway...depends on what you want to do...and what your financial obligations are.....not bad either way you want to go....but just because you can't afford it, or don't think it is worth it....I wish people would quit b*tchin'.....get what works for you.
Some would rather jump in and start as high as they can go...rather than go years building up here and there with lower level stuff....cameras, cars...women....etc.