The 2008 Audi A4 quatro with Tit pkg and S line is MSRP of $34,275, so its not much less??? The average person is paying about $33k. The A4 weighs 3550# and has 200hp @ 5100 rpm, 207#tq@1800
rpm. So its not being to be fast by any means. I would think it would be about 7 seconds to 60 with a manual, just a guess. If you really want the 135i save for a little longer, the prices aren't that different.
I just noticed you said with some other options. I think Audi's are great cars, but I am sure BMW owners will disagree. Good luck. Save and get what you want, life is very short.