Well, the rst one might have been a joke. rst isn't regarded by most as a good suspension company. If I were you I would look into getting a recent model rockshox judy. It's their lower end forks but aren't too bad for the bike you are putting it on. A judy xc u-turn would go good on that bike and they're pretty cheap. And I say the u-turn version because as I said earlier, 100mm is probably too much for that frame so you can use it at 80 instead. Don't think they have the Judy for 2005 though. I've seen them on ebay for $100 new. The new fork will probably feel soft though after using an older fork. Marzocchi makes the stiffest stock forks if that's a concern to you. You could look at the Manitou Axel as well but I;ve never ridden one, just an option. The Axel models are a step up from the six's and are still fairly cheap but should be better. At least it's not the bottom of the barrel.