totally addicted to this game also,
only got 1 car to unlock and that the arcade mode complete only at level 26 oncareer mode, have a good few cars but heres two my faves
my 2006 btcc vxracing astra
only tuned to about 449 bhp, but handles a dream
my other wee car is
2007 btcc arkas astra
done every mod you can with this, even converted it to rwd for a laugh
have plenty other cars but these are my two favs right now!!!
p.s. if you have any btcc livery cars that you would like to sell let me know!