I know I've made a million of these posts but my MX510 has officially died, and noone sells it anymore, so I'm fucked. Have read some reviews of the new logitech mouse vs the razers and most of the time razers won, but they look completely difference shape/size and I dunno if I'd get on with it. whats the difference between a diamond back and a copperhead anyway?! So, what do you use? why do you like it? what should I get? Don't wanna spend much more than £30 mind, unless you can gimmie a good reason why I should.