budget wise i.e a lot of car for little money vauxhall vectra sri diesel or omega 2.5 cdx (bmw engine and full leather and all the toys).
passat diesels are very quick for a big derv car.
and obviously theres the audi a4 avant (or much cheaper a6 if you dont mind a larger car, i prefer these personally).
and the old bmw touring, you can get them for decent money if you look around (and without astronomical miles).
thinking of buying a diesel estate myself found a cdx omega local on an n plate with history and leather and all the bits for £1100 - any one want to buy a mark 2 golf gti?