As gaming becomes more cut-throat so the need to have everything at your fingertips is paramount. The Corsair Scimitar RGB might become your weapon of choice..
It's surprising how much you can do with these types of mice outside of MMO, having the G600 I can play wow 1 handed. but also they are good with things like photoshop and maya with a lot of shortcut keys, use the dpi+/- keys as shift and ctrl and you have a 42 button mouse on this 1, the G600 actually has more buttons.
I think once you have 1 of these and realise how versatile they are it's hard to even think of going back to a normal mouse