I totally Agee with The Hefay that the Sony straps have gone down in quality. The A100 strap was far superior to the A99 strap for example. I really like the old Minolta straps that DK can provide. Very comfortable material, with a handy MS card holder included. Great on my Nex 6.
I use a Black Rapid for my A99 with an Arca Swiss adapter on it to fit to my L plate. It stays on the tripod most of the time thought
Nex 5, Nex 6 (IR), A7M2, A99 and a bunch of lenses.