I have a MK4 GTi for driving around with the missue and a mk2 8V GTi with a very turned engine for the weekend. It seems to be the perfect setup.

However I'v have heard that the Turbos can have a lot of problems so have a good look around before buying.
To be honest I would go for the GT TDI and chip it. (MK4)
VR6 fast but with pertol prices????and it will have to be a highline!