I bought a super nice 2008 G6 GT coupe with 108,000 miles. Cant fault the car, its clean ,dent free and runs great. I have a chance to buy either a 2007 GXP coupe with 3.6 and only 65,000 miles, or a 2008 Saab 9.3 with v-6 turbo but with 130,000 miles. I beleive the Saab is the same underpinnig but am concerned with part availability. Just feel like I need the extra horsepower. Both cars are $2000.00 more and premium fuel. Thoughts?