With me being a fps gamer first, then mmo, i got myself a Razer imperator about a month ago, and i love it, great ddpi, but like i said, its more of a fps mouse, it has 2 extra side buttons, that you can link to 8 abilities i think, ( only linked normal button, and with shift, have not tried alt and ctrl yet)
http://store.razerzone.com/store/razerusa/en_IE/pd/productID.231103900/parentCategoryID.35208800/categoryId.36716200
I didn't buy it from razer itself, but from another retailer for 80 €