Go for a remap that will give you a nice chunk of power and torque. If you join the VWAUDIFORUM they have deals on remaps for roundabout £250 with before and after sessions on the rolling road. Also most people see an improvement in fuel consumption as well.
A chap i know got his 55 plate Bora done at Jabbasport and ended up with 190 bhp plus over 300 ft lbs of torque. He still gets 50 mpg plus on a run. Jabbasport are not cheap but as i previously mentioned there are deals on the other forum.
My mate had the saloon version of yours lowered nicely, not slammed and it handled really well but alas some toerag t boned him at a junction and that was the end of his Passat. I have a B5.5 Passat tdi and love it, big comfy and goes well plus it swallows the miles with very little wear and tear.
These produced up to 150 BHP as standard, and I bet it wont put the power down in the wet!
A mate of mine got over 200BHP out of his with meth injection, a bigger intercooler and a hybrid turbo

Its smokes a bit on boost though
Edited by Carlos W, 12 November 2010 - 07:19 PM.