a few questions before I buy

[paul07]

I am new to Audis but not to mechanics. I am looking to get an audi A4 or A6, just curious of what the pros and cons are. A4 1.8t or 2.8 or 3.0 A6 2.7t all quatro models.
I am wondering as far as performance maitenance, reliability, mileage expectancy, and modification, which one is best. I am really interested in the A6 2.7 biturbo. Now by biturbo, is that the same as twin turbo? Also, I know six spd os amazing, but how well do the auto''''s w/ triptonic hold up and perform, Wife wants auto I want manual, is it worth it?? Also what is the best overall Audi under $12,000. Any help would be appreciated. sorry for all the questions. I am just kind of oblivious to audi tech.
Paul

[Tifun]

A6 2.7t will be fastest modded and stock pita to work on. 1,8t has tons of options and can be made very fast as well. pretty easy to work on as well. i wouldnt want the others unless they were for the wife.

[paul07]

what makes the 2.7t so hard to work on??

[njm23]

there is no room in the engine bay.. You have to pull the engine to change a turbo on it..