Well, for now, I'm considering the different possibilities.
I own two camera, the Minolta 7D and Canon 30D. With the Canon, I have some very expensive prime that I am very happy with. I'm just disapointed by the 30D behaviour at high ISO...
I guess a lot of people must be either shooting in JPEG, or at low ISO, but me, in the other hand, I shoot in RAW and I often have to shoot at ISO 400 or higher, and at 400, I can already some anoying noise, when it's not the case on my minolta, and at 800 it's really anoying even with noise ninja. 1600 is not that bad, but just still a little worse than 800. By the way we can use like ISO 1000, 640 etc. with the 30D, I find this pretty neat, if only the result wasn't that disapointing

Well, I would have to shoot with a K20D and see how it handle ISO 800 and 1600, and if he does, then I will go for it.
Otherwise I will have to wait for the 5D to be repleaced, and get either the replacement, either the 5D that will have dropped price. And in the meantime, I'm wondering if I will either sell the 30D and get new lens for the minolta, or sell the minolta and save up for the 5D

If I sell both Minolta and 30D i would have something like 1500€, that's 2300$...