I have a PC at work that does pretty well. If I personally owned a PC, I would want one like it. But my other work computer is a G5 dual processor PowerMac running Jaguar (we haven't upgraded all our work computers to Panther yet and we won't likely go for Tiger at all until Adobe and Quark upgrade their software to operate on it -- I'm a Web developer and graphic designer).
At home, I have a G3 PowerBook Lombard that I've owned for six years and just upgraded to Panther from OS 9.2. The thing works faster and more reliably than it ever has in the past. I also have a G3 iBook (the white one) that I shanghai'd from work. The iBook has less memory, but we use it because it has Office on it. I haven't gotten a copy of Office for my Lombard yet. Still working with our IT department on a seat license for that. Again, with both of those, I will wait until Adobe and Quark upgrade their software before updating to Tiger.
I'm a longtime PC user (since early 90s), but made the switch in '99 and have no desire to go back.
Once you go Mac, there's no goin' back.