From a personal perspective, i am no fan of rFactor, and seldom fire it up. I am a big, big fan of GTR2, although my experience with P'n'G is very limited; but i really like some of the cars, in particular the 5speed Arbarth. Another aspect i really like about the mod is the "feel" you get using the gated shifter. I like the variable weather in GTR2, especially with the weather generator thingy which gives a forecast in advance, and night-racing looks a treat; but both come at the cost of frames, and i wouldn't want to rule anyone out, simply because their machines couldn't run it.
you cannot argue with the numbers, and even 20 weeks in (20! 'kin 'ell!), there are still plenty of people turning up (although I've slept for the last couple!)

i do not feel it would be right to switch games at this time, although I wouldn't rule it out in the future, as long as everyone is happy to switch.
I wanted to canvas opinions, simply because i don't want the series to go stale. The cars can be varied, as long everyone has at least a chance of getting them round the track. Personally, i love driving the Cortina, and am happy to continue with things as they are. But I'm not adverse to change, and if you want to mix in some special events, then let's do it. Jarkko has mentioned Arbarth's, Lee loves his Alpines, and i remember Warren was keen on the Mini's being included, all of which would be great fun (as long as we can also include the beautifully modelled Elite). However, the soul of AlfaTina is GTL, and at this moment in time, it is not negotiable (wow... get me... consider yourselves moderated!)