In my opinion we should use Arcade cars, for the first races. And the ones that are available since the beginning, as not all people might be too far into the game, yet.
As far as track, I really do not mind. Everything works here. As far as it's not anything too technical or long (Nürburgring Nordschleife or Circuit de la Sarthe I or II). These would definitely scare a lot of new partecipants away, just like Luxy said. Plus they take far too much time for somebody to even complete one lap, not mentioning getting it clean.
I think we should use Arcade cars as much as possible. This way we will all be able to post our times at db.granturismo.de and here in GTPlanet, whenever the Leaderboards are completed.
SADJO
EDIT: Off-topic, but if someone could just answer this in the next post it would be great. Question: How do I upload my own avatars?
You have to wait until you posted at least 100 posts, before you can upload your custom Avatar.
Now, with that said, do not go spamming all over the place
This useful post made by Jordan -
Custom Avatar & Title Requirements - explains all you need to know about it.
The Wizard.