What do you think about the positives/negatives between the SRAM Force and the FSA SL-K Light cranksets?

I can get them for around the same price, so I'm more interested in performance (i.e., stiffness) and durability issues. For example, I've read about FSA's 2008-09 cranks having issues with drive-side crank arm loosening. Has this issue been resolved?

Really appreciate all feedback. Thanks!