I've got both, Cav CD and Vectra CDX. My V6 Vectra is currently at Courtenays having the final parts of some head work and downpipes done so at the moment I'm running the Cav as my daily drive again. I really enjoy having the old Cav on the road, it's a great drive, runs nice and produces the noises, creaks, rattles and thunks that only an old car can. It's utterly comfortable too. The Vectra is far quicker but has the modern "eco" power delivery that a chip made better but still noticable. It's great to have climate control (albeit a bit weedy) and cruise which I use all the time. The leather is far from sumptuous and as Chutney said above, the seats are a bit hard. I wouldn't describe either cars as dynamic but they are both sincere, reliable and dependable and both return in the early 30's mpg under normal driving. If I was going for a hack and some fun then I'd reach for the Cav's keys every time.