The low end R AM kit is awesome value for the money with no crappy parts. When you negotiate the price try and get these modest upgrades thrown in for free.
TruVativ Stylo switch to Shimano XT
Avid Juicy 5's switch to Shimano XT
Lizard Skin Charger grips switch to ODI Ruffian grips
If they say no, talk to a different salesman.
A great fork that's CHEAP is the RS Domain 318. (Don't get the 302 version, I haven't read good reviews) This fork is the biggest bang for the buck right now for Freeriding. The other forks on the SC website are a lot more $$$. If you insist on AM forks the Nixon Elite would be a good choice, very lightweight. The Fox Van 36R is awesome too, but these are almost twice as much $$$ as the Domain.
Last but not least - do it yourself ghetto tubeless conversion.
http://www.nsmb.com/gear/tubeless_12_04.php
I'm saving my pennies for one of these baby's in the spring! Good luck!