Audi TT 180hp FWD Coupe. You should be able to get that very very close to $30k. In Los Angeles it seems many dealers have lots of 180 coupes, but few 225 coupes (if all goes well, I should be driving one this weekend), so they should be willing to deal. If you live on the East Coast it is even better, as they've been dealing on the TTs for much longer.
There are many cars that are cheaper and faster. There are also many cars that are more expensive and don't look as good. I wouldn't call the TT a 'pure' sports car primarily due to mediocre power, and it's rather weighty in the Quattro versions, but I think it has acceptable performance and damn good looks.
It will drive faster, and handle considerably better than the family station wagon, and that may be sporty enough for your dad.
Oh yeah, it only comes in a manual transmission.