Wired all the way. (and don't buy into anything that says 1000hz response rate etc.... it's a load of poo-poo, it's actually detramental to you CPU performance(interrupt poling), but that's another story)
Basically you should go to a PC Store if you have one near by and test out some of them there meeses, get an idea of which shape of mouse works best for you - I'm a palm grip, my palm rests on my mouse with my First two fingers going contour-style over the mouse buttons(not raised and claw gripped)with my remaining two fingers gripping the side of the mouse. Thumb is countergrip
For me the best mouse ended up being the Logitech G500 as this fits my hands and grip to perfection - ie. you really REALLY have to figure out which mouse works best foryouyour hand -
*95% of the gamer-grade mice out there have the same features/buttons etc. so it's GRIP not Brand-name.