[modular01]

I recently sold my 2001 Mustang GT, and in the next month and a half, I'm looking at another vehicle purchase. One of the vehicles I'm considering is a 2003-2005 PT Cruiser. Preferably the GT model with the 2.4L turbo, although I'd also consider a nice non turbo model. Overall, how reliable are these cars, and how well do they accept aftermarket performance modifications? I don't really have any experience with 4 cylinder engines. Most of what I know are Ford and Chevy V8's