As someone elsewhere has pointed out each organization has its own function and purpose. SAF goes after crappy laws and crappy states in courts. State org's hammer on state and local .gov's and the NRA is the 800# gorilla on Capitol Hill. People can take about the GOA and other groups, but the ones mentioned by the press and the anti's is the NRA.
And one final thought. When you are done bad-mouthing them, take a moment and thank them for the 2008 NICS Improvement bill. If it hadn't been for the NRA getting that passed, I can pretty much guarantee that Obama would have the record of every vet that ever mentioned PTSD to the VA on the NICS list as of yesterday.