Picked mine up recently, the best advice I found on the forum was to go for the best car you can find (milage and condition) regardless of spec as you can add your own "touches" later.
I think the blue and dark grey cars look the best followed by silver.
Also take your time, the right car will be out there just keep an eye on the net but be ready to act quick when you find it (found mine on gumtree and had deposit down 3 hours after it was advertised) the good ones seem to go FAST !