I had a Deathadder, but it started dying a couple months ago. I picked up a Thermaltake Ventus for $20 on a Black Friday deal as a cheap replacement until after the holidays. I have to say, I'm pretty impressed with it. It isn't quite as comfortable as the Razers that I've had, but it tracks every bit as well, if not better. For 1/2 or 1/3 the price of a Razer I'm really happy with it. May I replace it down the line? Yup. But I'm in no hurry. Thought I was just getting it to use for a month or two, but now I could see me keeping it for a year or more if I keep having other stuff I need / want to buy.
Build a man a fire and he's warm for a day. Set a man on fire and he's warm for the rest of his life. --Terry Pratchett