I use a g600 (hybrid claw grip) for my main computer, and it's a godsend. I have profiles for each game, and then a default one for windows where i've hotkeyed copy/paste and things like cortana to the side buttons (and ctrl for the third click). Highly recommended if you're into CAD/3D modeling, but works for everything else including shooters (battlefront profile of mine has the three cards as buttons on the side for almost one handed gaming).
As for cheap headphones, get the Sennheiser HD518. Absolutely nothing beats them in performance to cost in the $50 range.