Seems as though people have been experiencing some problems with the All Mountain 1 SL.
http://forums.mtbr.com/showthread.php?p=2637240[HTML_REMOVED]highlight=all+mountain+sl
I haven't ridden one either of the forks mentioned, but my '03 Z1 FR is still going strong. You can't go wrong with the reliability of Marzocchi coil/oil, so if you want something that's easy to adjust and maintain, I'd say go with the Z1 RC2. If you like to fiddle around with air pressures, then maybe an air fork is for you. Despite the negative reviews of the All Mountain 1 SL, I've heard pretty good things about the 66 SL1 ATA. Noel from Knolly has spent a lot of time on one, and he seemed to really like it - that is, after he got it dialed in.
Yup - precisely. The Marzocchi Air forks are really really dialed this year performance wise, but there were some birthing issues with the top caps and the "auto travel adjust" :) Marzocchi has a fix out now for the first gen forks and the new forks are supposed to be coming fixed.
Either way, once they are working properly (which Naz at the North Van Marz office can do), the air forks are really, really good. I mean, they pretty much feel almost like coil forks. We've got customers on the AM1 SL, the 66SL1 ATA and the 888SL ATA and they are all really impressed with their forks.
Just don't bother using the recommended air pressures on the sticker on the fork lower - do a search on the MTBR suspension forum and there is a ton of helpful advice on how to set up these forks, in particular the 66SL1 ATA.
Cheers!
Noel
www.knollybikes.com
ph: (604) 324-6635
fx: (604) 324-6482