Couldn't agree more.The BMW M6 and BMW M5 look like the cheapest high performance cars on the market with 507 hp from a v10. I would also think they are one of the most desirable bmw with that beautiful v10 engine. Followed a v10 m5 today into the city still sounds and looks good.
BMW M6 V10
BMW M5 V10
In many respects, in the same boat as Maserati V8's. Large engine cars, with high running costs... but I think they're pretty special. I'd go for an M6 or M5 touring for rarity.
If you have the funds to run these cars properly, they're terrific. I often have a look at what Munich Legends have in stock.
Another car in much the same vein is the SL55 AMG, albeit supercharged (friend has the F1 version).