allow me to pipe in again guys. with a few months of time on my flux before the snow hit, im a huge fan of adjustble travel forks on this bike. i run a '04 rlc talus and it really makes for a nice climbing geo when pulled down to about 3" (a tip i took from dt) and fun as hell at about 4 1/4 or so on nasty downs, otherwise im all over the 4" setting. personally i think anything more than 4" is too much for standard trail work but that could be a diff in ground type from cheese's stuff. now this fork might have some dive others dont like and its been well documented, but for my lightish 160lbs its dealable till i send it off to push for some love. i just ordered some new skis today (whattafriggindealigot!) so its gonna have to wait.... again.
wheels for a flux should be built xc race weenie light if ya ask me so id pass on the supercomps. currently i run xtr's, valiant osb's, alloy nips and comps but dream of 240's, stans olympics and comps, all in black of course. i too agree about the system wheels. too much cash and too much risk for the weight you save, if any.
drivetrain brands? pick one. for now i believe ones as good as another and i ride xt, xtr and x 9 depending on bike. but oh to have some xo! the cost is a bit scary though. the new 960 xtr f der is a real treat. nuthins ever worked as good or even been close so id suggest a upgrade from the xt part. the x gen works about as well as a xt but its a friggin brick.
toss some carbon at it, specially up top where it counts, and think super lite tires too. my larsons do well in most situations as long as its dry out. with money well spent, and lots of it, a sub 25lb bike is doable. i think mine is a tick over 26 last time i checked but the parts keep gettin changed. good luck and have fun with it all.