Out on a limb on here but if you want what I would say is one of the best track cars (as long as you get a trailer) I would buy a caterham R300 or R400 (I prefer K-Series engine more of a race engine in R400).
It will not loose money, easy to get fixed and if you do have an off is cheap to repair and also has the benefit of low running costs as things like breaks etc don't wear much due to weight.
Plus it will be the fastest car on track and walk all over CSL's, Porkers etc subject to the driver
I will get back in my box now and work on my CSL purchase
