Hey guys! I'm having a bit of a dilemma here. I have a 40D at the moment, but I'm not really happy with it, and thinking about switching. The problem is really that I can't afford anything from Canon with noticably better ISO performance (I shoot concerts a lot and would like something that's usable at iso 1600 at least, with the 40 I really have to push my luck to shoot at 1600 and 3200 is out of the question altogether). The one thing I can afford without losing the good handling is a 5d classic. I only own a 50mm 1.4 at the moment, so going over to the 5d wouldn't hurt my lenses.. But I was also thinking about going over to Nikon altogether. The store I work in just got a d7000 and its performance is really great! Nikon also has cheaper lenses, and the excellent 35/1,8 would be amazing to have for shows! If I'm going over to Nikon I have to sell the body, flash and lens I have, and have to even add abit more to get all the way to the D7000. The 5D I can get quite cheap, and having a 50 as a 50 is tempting. The problem here lies with the more expensice FF lenses (like the L series). What do you guys think? How's the high iso performance of the 5d classic over the 40?