I'll offer something constructive..
I started with 40D and a 17-85 IS. Did a job to earn 1k.. upgraded to 17-55 f2.8 IS.
Did another job for another 1k, upgraded to 24-70 f2.8.
When 5D2 was announced, I did yet another job for 1k, sold my 40D and 24-70 before it depreciated till where it is right now. Along the way I rented camera to do more jobs or borrow my friend's camera.
And bought the 5D2.
I hope it doesn't come to you as bragging but in my case, I simply save and work towards my goal. And certainly I feel that the end justified the means. If you feel that the means justify the end, I strongly eencourage you to go for it. Its a great cam.