Those bearings probably arn't as good or at least any better than the stock bearings. Please search for the EVO IV thread and post your questions in there, there is no need to start a thread for every question you have
Acer or Boca Bearings. The Boca's are nicer but more expensive. A ceramic Bearing would be an upgrade. I always just used the Std bearings in my EVO IV. You will go through bearings in your hubs because they are so small.