How giving our personal experiences about the quality of a hardware piece that's it's imprescindible for the OP is not going to help him? ^^
I know it's a lot to ask, but you should use your taxi driver logical reasoning before posting senseless things.
How does 2 people rambling on about the great old debate about mice helping him? Perhaps if he stated he cared about which mouse is superior it would be relevant, he's just looking for hardware to help him play the game better, not a breakdown of 2 of the many devices on the market.
Try re-reading all the bickering in the thread and you tell me how any of it helped him past the initial suggestions posted - it doesn't.
At lower levels focus heal generates a lot of aggro, so much in fact that using it constantly will cause you to pull aggro from the tank. I suggest that until you get to the higher levels use focus heal as little as possible and rely on regenerative burst and regeneration circle to heal, and only use focus heal when people are taking a lot of damage.
If you can get the retail version of the game and you are going to play this game longer than a week it's worth the 30 dollars.