First, EVO's are not junk. Secondly, Z's are great cars and have massive aftermarket support. I love my cobalt but, if I had my chance at a Z for that cheap with that many miles I prolly would consider trading it in for the Z. The camaro will be out in 2010 I believe and in a different price range for a v8 (prolly upper 20's lower 30's). I would go for an EVO VIII MR if I went for an EVO. I know people should be encouraged to buy American vehicles but there are some damn good foreign cars out there.
2V Mustang GT - Cammed/Sprayed - The "Mustake" - Sold
2010 Cobalt 2LT - SOLD!
Chrysler 300C Hemi K&N & Tune
2005 Cobalt SS Supercharged - E85 TVS 2.9 - SOLD!
2001 Corvette C5 6MT