Vectra vxr with standard 2.8t engine is a quick car, but on top of the cost of the car, a decent brand set of coil-overs is nearly a £1000, and they are a must as it under steers catastrophically. So buying one and then some lowering springs wont help.
I don't personally rate them. Eagle F1's are the same price as rainsport of mytyres.co.uk. Why by a lesser tyre for the same money, makes no sense! Everyone's preference I suppose.. Eagle F1's now £100 a corner, cheap IMO. I paid £600 for four including fitting/balancing and tracking recently...