I've voted for BL standard (I know i keep changing my mind), It's a classic and perfect for longish events, as you get a nice break once a lap
AS_club is a great track for evening sprints but just not big enough for 20 cars x 60 laps, and besides you don't get a very long race with club.
Fe Green Reverse is awesome! It's super technical and every corner is a potential car killer, really sorts the men from the boys. (ahem
)
With BL1 as the track we would attract a LOT of newcomers too, possibly running to 2 full servers.
UFR should be allowed tho', it might not be quite as fast (or is it?) but adds to the flavour, and i'm sure quite a few people prefer the UFR for it's 'chuckability'.