Now, with the G4 at home, I am amazed. One of the first things I did with the new Mac was upgrade its memory. Now running over 300MB, I can handle pretty much any application without fear of running out of memory. At the time I am writing this, memory is dirt cheap, and looks to be even cheaper in the near future. So this was not a real expensive upgrade, though it is the most important upgrade any computer user can make.
Memory is key.
You can never have too much, but you can often have too little. It is still fairly new, as the original monitor I purchased with the 6500 broke down, and this is an Apple replacement unit, only two years old. It also holds the speakers, something I had not thought of before I got the G4. Those both work great, and I saw no need to replace either unit. The biggest drawback, however, was the sound quality.