I just purchased the Cyborg/Mad Catz MMO 7. It is amazing and I doubt I will buy a mouse from anyone but cyborg/mad catz again for a long time. It, along with the cyborg rat 9, is the most customizable mouse I know of. They just released a red version and a black version. A really nice perk to the MMO 7 is that it has customizable LED lights in the front of the right and left click buttons that can be changed to virtually any colour and programmed to changed with the handy "mmo shift" feature.
You might think that the MMO shift feature and all those programmable buttons are not for you since you don't play much MMO but trust me, they come in handy in a lot of ways! and honestly the MMO shift seems like a feature that would be great for first person shooters too (not sure why they dont market it that way too).
Here is a good review video:
If you dont like this one, I would strongly recommend checking out one of the cyborg R.A.T.s instead. Nothing beats the customizability and the aesthetics are quite unique.