Welcome back Mike
Never owned a fozzy but the mpg would be pretty much the same as an impreza I expect.
In terms of the 2.0 vs 2.5 argument... the 2.5 is well known for having problems. Safest bet is to stick with the 2.0 unless you find a nice 2.5 that's been forged/fixed. Plenty of threads on Scoobynet about 2.5 failures. You might find a good one, but the failure rate is higher than I'd want to risk if I was buying...