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, 6MT, dealer-installed PPK - Euro Delivery 5/11/2011
'05 Lotus Elise (Arctic Silver) Sport, HT, Stage II, Odyssey PC925, Lotus Cup 240R Wheels
'87 Nissan Pickup (Burgandy) King Cab, 90k miles
'13 Audi A3 TDI (Ibis White) Cold Weather Package, Bluetooth - Wife's car - Delivery 9/12