Not sure if it's a QC issue but don't get me started on the G600.  If you move the mouse too fast in an game you would be either staring at the sky or at your feet.  What a shame too 'cause that mouse was so comfortable.  I'm currently using a G400S (basically an MX518) for playing FPS games.

can't you change the DPI on the mouse with the logitech software?

I used to play with a logitech G500. Within half a year it was already having the double click problem and at the 1 year mark it became unbearable (couldn't even use it reliably for normal pc use). I switched back to the Microsoft Optical Mouse that I was using before the logitech and never looked back. It's actually undergone heavier abuse now that it's been "in service" for 4 years already. I would say the only problem is that it is a bit too small to fully rest my palm on it so my wrist is usually on the mousepad. 

I was always under the impression that logitech stuff were well built or something but after the g500 ordeal I wouldn't want to risk it again. I may have just been unlucky but I do know that the double click problem isn't unique to me.

As for keyboards,  use the CM Storm Quickfire TK with brown switches. Blues were too clicky and I didn't like the Reds and Blacks when I tried all switches while Brown hit that sweet spot. I bought the TK version simply because the TK-less wasn't available withou importing which would defeat the point of buying CM since their keyboards were the cheapest available at the time. I really love the keyboard though, and the numpad is useful for some games so it's not so bad.

My preference:



Logitech G1. The very first of the Logitech gaming mice series.

One of the top mice for Starcraft brood war progamers in Korea. Certainly not the most ergonomic or high-functionality, but it holds no surprises and is a fantastic beater mouse for hours of gaming.

Have you guys considered vertical mouse
http://www.hanselman.com/blog/DiggingTheNewVerticalMouseHelpingMyCarpalTunnel.aspx
dont wait for Carpal Tunnel syndrome.

Have you guys considered vertical mouse
http://www.hanselman.com/blog/DiggingTheNewVerticalMouseHelpingMyCarpalTunnel.aspx
dont wait for Carpal Tunnel syndrome.

I've tried them, but didn't get on with it.  I'd prefer a track ball to the vertical.

I run a magic pad and magic mouse side by side on all of my machines so I can swap back and forth.  I like them for different applications and it lets me mix it up to keep discomfort away.