how long will a fancy mouse like deathadder elite last? this is for heavy use - a couple hours of video games per day plus a lot of hours of computer work/browsing in between. i'm thinking about buying one but only if it will last for a few years. otherwise might as well just buy cheaper mice and replace them every year. in the past i bought $20 mice and the buttons start double clicking or middle mouse button breaks after a year or so, is something like deathadder elite more durable?