I got my 2000 GT 2 years ago for $13,900 @ 8.5% (5 year loan). So far I've paid $6,600. If I traded it in for a 2000-2002 Audi S4 for roughly $17,000, how much would my payments increase? I'm paying $275 a month now, and I wouldn't want to go much more than $325'ish a month for the S4. I know absolutely nothing about this stuff and I'm terrible at math, so any info is appreciated.