I really don't have much of an idea. Everyone will have different things they want in a mouse. My corsair M-65 just arrived a few days ago, and so far it seems quite nice, but at the same time all mouses I've used before this I got for free, so I can't say much about comparing mice.
Best strat: consider what you want in a mouse, a price range you think is reasonable, and then look for it on sites like amazon and newegg and see how the reviews are. If it has 4 stars or higher and has over 100 reviews, it is probably a pretty solid product. That's pretty much how I ended up with the mouse I got.
(I'd personally be interested in trying the R.A.T. mouse, but I think the one there is a pretty old model)