For people that want a 3000 lb bare bones car with a small motor- go to lotus. You better hurry because they're teetering on the edge of bankruptcy. Nobody wants a $50,000 slot car as a daily driver.
I did just that, but at 2000 lbs. with my Elise, which is fun for weekend/evening driving. Would I want to drive it every day in traffic? Not really. On the other hand, would my daily driver E90 335i make a good track car? Not my first choice for that duty. I like having both, because each serves a different purpose.
'11 BMW 335i (Alpine White) M-Sport, Premium, Heated Seats, HK, Ipod adaptor, dealer-installed PPK - Euro Delivery 5/11/2011
'05 Lotus Elise (Arctic Silver) Sport, HT, Stage II, Odyssey PC925
'87 Nissan Pickup (Burgandy) King Cab, 80k miles
'13 Audi A3 TDI (Ibis White) Cold Weather Package, Bluetooth - Wife's car - Delivery 9/12