I'm 44yo 5'10'' 145lb RR raced last 3 yrs (cat III) due to back surgery I'm finding mtn bike is easier on the back. I plan on racing mtn bike again (it's been 4 yrs since my last mtn bike race) and I'm currently riding Santa Cruz SL but I'm looking for a little more "plushness". I've researched the web and I'm even MORE confused HL,ITC,TNT,DW.I still want the bike for trail riding as well as racing. I'm looking for advise on picking, (not so much emotions, although 1/2 of biking is emotional) one of the above bikes and why. Of course other suggestion are welcome.
The four bikes you list are in the overall very competitive. All are raceable trail bikes, but the biggest differences between 'em will be geometry, adjustability, and what vibe ya (you personally, not me or anyone else) gets from the manufacturer. I think the Salty might be a bit beefier than the rest, but then again Sherwood is considering reviving the El Feugo as a 4" X 4" race/trail bike (steeper angles, lighter weight. See the thread http://forums.mtbr.com/showthread.php?t=148222
I ended up with a '04 Feugo (3" Brother to the Salty) and it's very nimble, yet stable. It's a bike that keeps telling me 'go faster'. The '05 has a updated linkage and can be available with 4 or 5 or 6 inch rockers. The things that sold me on the Feugo was the geometry and that it was adjustable - it was a bike I could ride as a 3" or 5" with a change of rockers (and maybe swapping out some of the more XC parts.)
The geometry of the Flux, RX, and Truth are all a bit different than the Salty. Which one fits your
frame best should help choose which ones to look seriously at. Green Giant and Kapusta would both be good ones to page here, they've both had time on some of the above listed bikes. Kapusta's had time on both the Flux and the RX, and can give some insights there while GG's had some time on the Racer X/Hammerhead and the Salty.