I love the designs of Razers' mouses but I absolutely hate the software associated with them (same goes for keyboards). For that reason, I wouldn't suggest Razer.
I've always used Logitech for gaming. I have their G500 mouse and the G25 Steering...both work perfectly still (after 3-4 years of gaming on a regular basis). I also found myself loving the company because of it's extremely good customer service (when things do go wrong). As for the mouse model...looks for deals man, you'll save a bunch (or get a better product). Not quite familiar with European online stores but in Canada, I'm a big fan of NewEgg and NCIX (for their awesome deals).