My spec 3+ lastest two full seasons of beating the crap out of it. This was when my car made 650+rwtq on spray. It was a great clutch. Now my spec stage 5 has been replaced 3 times in two years. I would not recomend it.
I've heard good things about the Moster and it seems to be priced well when you get into the higher level clutches.
http://www.monsterclutches.com/
Alot of people seem to like the textrilia and their twin disk is only $1250. I really like the new RPS twins disk clutches and if i put a twin in my car it will probably be a RPS.