Get a Sugino crankset or one of the new Shimano sets with external bottom bracket bearings. Truvativ's quality and parts sizing is very inconsistent--results are short bearing life, incurable noises, and chronic left-arm loosening. Race Face looks too much like a Truvativ or FSA product to be substantially better.
With the new system (external bearings, left arm fastened to spindle end) it seems to work best when the left arm is slotted and clamps around the spindle a'la all of the Shimano cranks and the low end (really good value) FSA Gossamer crankses, also consider the newest Campagnolo cranks and any Sugino or older Campy set (many mail order bargains if you look) that still uses a four-sided tapered spindle. The square spindle has never had anything wrong with it--ISIS and Octalink and external BB's are solutions in search of a problem. Mechanically, Octalink is the worst because it is the easiest with which to mis-load a crank arm and get incomplete engagement between the arm and the spindle.