You can't expect any reasonable suggestions here because they are such different cars. Ultimately it comes down to what YOU and ONLY YOU likes, needs, and can afford.
If it was me I would go with the 2LT. I like some Audi's but these A4 seem very "blah" in looks department. I don't think these have that timeless classy look of other Audi models or BMWs have. That is ... unless you need 4 doors.
2004 Corvette Z06
1996 Camaro 3.8L (M5)