Complex String ... ew.
If you do decide to pick that one, though, I'd prefer it if you picked the reverse version. That one people barely know even exists, so that'd be even more fun. Plus it's a nicer drive than CS. The car should also definitely be an arcade car so that we can concentrate on the driving and don't have to waste time on setups ...
Preferably the GT-One or R390, otherwise it takes forever to finish just one lap.
I really miss driving Sim Tires.
Would love any race that uses 'em (although preferably not the V12 Vantage or a car like that, because that sucks). Very pleasant streetcars on Sims: RUF RGT, Lotus V8 SE, GT40 Road Car, etc. I haven't tried many Race Cars yet, but I'm sure rock-solid cars like the S2000 LM Race Car are still gonna be great on Sim Tires.
You can 'fix' a Sim Tire car quite a bit with settings. For the RGT I allowed only a simple semi-suspension upgrade in a Sim Tire challenge (the rest stock), but that really helped - together with the rear-wing you could make it a very stable car that just tore through Deep Forest.
As for tracks, I love most of them, but especially the reverse tracks are great. Somehow most of them are a lot smoother than their regular counterparts. I particularly liked AH2 for some reason. Maybe it's because often you can't see much of the track ahead of you.
I also wouldn't mind a 5 lap race maybe even with Tire wear (Sim Tires actually last forever so a combo is possible
) - it would give more 'realistic' laptimes and all this 'do or die' driving on some tracks really annoys me at times - you'd never drive like that in a real race.
Ah well, that's just some thoughts though. I'm okay with most stuff.