I have a Audi S3 225 Bam, modified & mapped to 300bhp for my daily.

Things to look out for weak vacuum system.
rear springs crack.
oil pick up blocking up. due to long life services.
dodgy coolant temp sensors.
rust on roof rails.
haldex pump failing
gearbox failing.
coilpacks (recall)

There reasonable quick enough, not exactly exciting but a nice place to sit with some nice touches. Try & get the best example you can get, getting hard to find good ones.