UKPassats

So I'm thinking of switching the Passat for an new shape Audi, 2008 or newer. Just wanted to know what the best engines were? And what is the difference in trim levels? I've seen a few well spec'd A4 estates on Autotrader at around £8-9k. But I'm not willing to drop to a lower spec than my Passat: Sport model with heated leather/suede interior etc etc. What spec do the standard A4's come with? And are they even any good as a whole?

Any help greatly appreciated.

Bob.