Try a G4 dual processor. I grew up with PC's, but I'm into digital images, digital video and web stuff. PC tecnology used to renew every 6 months or so and I got so tired of getting a cutting edge machine, just to be on the tail edge a year later. I have both a Mac and a PC now and only use the PC for database stuff, and several other dells and IBM's, which for whatever reason I can't bring myself to get rid of.
The browsing problem may be a function of phone line vs broadband. I'm lucky to have completely forgotten what it's like to dial up and wait for web pages to load. Broadband is a blessing for those, like myself, too impatient to stare at a screen and wait. -TM-