Oh I am! It runs pretty much anything I run at it! Oh, and It is waaaaaaaay way faster than my 933Mhz G4. I know people say it lags a bit. Well what do you expect from a machine 5-6 years old now? This was built in 2003 and it's now 2009!
To be honest, it's such a powerful machine, i really don't see much lag unless I tax it really bad. And it's very little lag. Mainly I get lag when dealing with an app that's using a lot of HDD Bandwidth and I have another machine using HDD Bandwidth. That's when it mainly lags. I am working to remedy that though by setting up a RAID (RAID-0) so I can get more bandwidth by spreading it across the SATA Busses.
I can't WAIT to get that new memory!
Then again, it's only 1.5GB More ram. But man, that would be sweet!