if the mods don't like other forums being posted feel free to remove i don't think these will really sway anyone away from tr/tf per say
these are 3 i've been reading up on to figure out pros cons and such
RennTech.org
Rennlist.com
Porsche | 996 997 Turbo GT | Owners, Performance, Research - 6Speedonline.com
i'm on 6speed more than the other two
also as far as good high end forums
Luxury4Play.com
Teamspeed.com - The World's Premier Luxury Forum
l4p is a car forums / life style
6speed is mostly a porsche forum with everything else high end mixed in (high end cars and style)
teamspeed one of the 6speed guys told me to check out i haven't really had time for it