Or at least 'dampen' the variations. Not sure how it was in previous seasons, but this year there was often one car clearly advantaged.
I am not so sure about that, for two reasons. Firstly, I feel that if there were three or four viable cars every race the permanent ambiguity would be exhausting. And secondly, if the variations are damped and bonus percentages get closer to each other the odds are that PG cars will win most races (for evidence, consider the the 2008 season). In any case, the simulations would be interesting to see...
(Note that the first reason is close to the well-known Akoss' objection to the bonus system. While I do like the system - it gives an alternative to people who can't stand the main car of the race, and the occasional multi-car races can be very interesting - I believe the drawback he points to is real, and worth considering.)
My votes: Melange and Lotus [Edit: and GT3, sorry ]
. The other three would be Speedgate,
and F40. However, I (i) am in two minds about Speedgate;
(ii) don't want to vote for my own car;
and (iii) don't like the F40 quite enough to vote for it ahead of the other ones.