There are also premium standards . Of course the Prowler and all the other open cockpit cars. From the closed cockpit standard cars I really like the R8 LMS, it looks very good!
I'm gonna have to shoot you down on that Ford GT LM Test Car. Yes, the naked carbon fiber body looks drop-dead gorgeous , the rollcage and extra support welded on the interior looks really nice, but what really turned me off was the steering. It had the same thick steering wheel as the base model Ford GT, not a thin, lightweight racing steering wheel.
For me, I'd say the Pagani Zonda R and the Toyota FT-86 G-Sports Concept. The pink highlights in the interior look cool and funky.