I'm looking to buy a reliable station wagon for between $4k and $10K and I'm considering Volvo V70s and BMW 5 series. I need a wagon to haul sea kayaks ang gear around. I'll travel quite a distance for a good low milage car. Any comments on the advantages of one model over the other would be appreciated. Interested in the performance differences between the 6 and 8 cylinder BMW engines. Any problem areas to watch out for? Any tips on spotting inattention to regular engine maintenance?