There a a couple of things to consider before rushing-out to buy a car .
What is you budget like ? ( there is no point in you getting a Hi-end car if you're going to go for cheap electronics )
Most importantly How Much are spares ; And are they easily available ...
( If you have to wait a couple of weeks for parts & miss a race ... you will be gutted & disapointed )
It might be worth checking @ you local club What Cars most people run ...
( if you're getting back into racing , you should consider a popular car . In casse you need hand ; most racers will help you with both Setup & spares )
It's good to consider exotic cars such as the X11 or DEX410 .
but if you're the only one running the car ; it's a lot harder to find a good setup .
Hope this helps .