Generally, the SRAM models are less expensive and lighter than their Shimano counterparts. Generally, SRAM derailleurs require a somewhat fussier tuning than their Shimano counterparts, hence the reported shortcomings of SRAM front derailleurs. There were also some false starts with titanium cage on the Red front derailleur and road hydraulic disk brakes. SRAM has since gone back to steel cages, the road hydros were recalled, and all hydro disc brakes have been re-engineered.
That said, I've been happily using Force 10-speed for a little over two years. I do get rare chain drops, but no more than I experienced with Dura-Ace 7800. On the positive side of that, I can't remember when a SRAM chain drop forced me to get off the bike--I've always been able to pop it back on to a ring using the shifter. If I were to buy another bike, SRAM 11-speed would be my first choice drivetrain.
That said, take Bob's advice and look at Campagnolo, too.