Well, still on hols and bored out of my skull so I thought I might D/L some more tracks and do some testing. All tracks mentioned are from No Grip and driven in a Cortina with default suspension settings, so lap times are not as quick as what can be done, just me doing 10 laps or so, and also allow for teh fact that others are faster than me.
Botnairing
(Finland) this little circuit has a 1.23 odd lap time. Nicely cambered corners and would be suitable for a smaller Car Vs Car format. Has a really nice mix of corners with a sweeper onto the S/F and a 90 degree T1 (good for passing). The track is wide enough and set in amongst trees all round so its a small D/L and should allow good FPS. Of note is that the flat format and compact layout lets you see other cars on other parts of the track, not just immediately infront or behind. A nice little immersion factor.
Gellerasen
(Sweeden) Is much the same on the graphics and immersion front as above. The 1:20 sec lap has 4 big stops, but 2 reasonable length and one long straight to go with them, and is a really nice track to drive. The entry and exit to the S/F straight is similar to Zandvoort in layout and the slight undulations make for good delicate driving when the suspension loads/unloads. Even though its stop start, and compact it has a good flow with some nice constent radius corners. This could be a nice place for Detroit muscle to get up if tyres and brakes are managed well. Could be good for Tc65
Hidden Valley
(Australia) Is located just outside Darwin in the Northern Terretory. Principally a club circuit built onto either end of a drag strip its facilities were upgraded about 7-10 years ago to host a round of the Supercar championship, which it has done ever since. As stated before it has a looooong wide front straight, followed by a nice 180 degree left and then some flatout left rights which run half the length of the straight, from there this circuit can punish curb hoppers, so precise driving is necessary for a quick lap which is under 1:25's. What the falcons and Mustangs loose in the twistier stuff they should more than make up for down the drag strip. Another good TC 65 option.
Kinnekulle Ring
(Sweeden) This 1:05 sec circuit never stops turning, even the S/F straight is kinked and you go from one corner to the next. Really testing and all the corners are similar in speed and some elevation changes make the car go lite over crests into corners and imminent disaster without constant vigilence. This track will flog tyres over any sort of distance and offers little opportunity to pass and would only be good for a one make or Car Vs Car style event IMO
Sandown
(Australia) Like Warwick Farm, is made around the outside of a horse racing circuit and was the home of the Sandown 500, the warm up to Bathurst for almost 30 years. This circuit has two long straights with a set of most challenging corners in at the end of the back one. The pits used to be located where the tarmac is now between T1 and 2 but updated in the mid 80's to where they are now along with a twisty infield section to bring it up to the minimum FIA length to host a round of the world sportscar endurence championship in 85 and 89 (both of which I attended) This power circuit is another possible choise for TC65 as the long straights should balance out against better handling cars. And lap times are in the 1:28's for the cortina.
Teretonga
(New Zealand) This circuit reflects the real circuits of the day in Aus and NZ, being cash strapped and not wanting to make them shorter, they were made narrower to save money on tarmac

. A very long straigt with a set of average corners to get you back there, this could be a good place but there are probably better choises, a nice track to drive on though, could be worth a look to mix it up if you so choose. Laps are in the 1:12's
Hope this helps you further with tracks that you may never have seen or heard of in the persuit of another great season of NASJ GTL
cheers
Mike