Well, I still use the logitech G9x, perfect for claw, my son has a Corsair m65, bought it because he plays more strategy games as fps, If you have big hands, you can use the m65, my son also use the claw grip for this mousse. The M65 is a nice mousse, but expensive.
If I was you I would go to a pc shop and try some mousse and buy the one that feels right in your hand. You play FPS, so to much buttons at the side is not so good,
I would say 3 buttons at the side is enough for FPS. About mousse without cable, well there were only 2 that I could say that was good for FPS, the old Microsoft X8 sidewinder and the razor, my other son still use the X8 for FPS.
With cable is the only way that you can say that there is almost no delay with the input, but some will still feel a delay with a cable mousse.