I'm on my third desktop replacement notebook from HP. The performance is excellent for all applications I run, with the exception of gaming - LCD displays are just not fast enough to keep up with CRTs. That's not to say they can't run games, I regularly play Half-Life 2-based FPS games like Day of Defeat on it and it does a respectable job, just not stellar. One MAJOR problem with a notebook of this caliber is heat - the reason I'm on my third machine is that the first two died (fortunately while still under warranty) due to overheating. The first machine (zd7015us) had to be sent in for service 5 times in the first year before HP simply replaces it with another (zd7380us), which had to be sent in for service 3 times, it died again two days after getting it back from the last service, and HP again replaced it, this time with a zd8200CTO (That's "Customized To Order). During my (many) conversations with HP's customer service, I was told that since they pack so much "stuff" into these little packages, that they are PRONE to overheating when playing video games, and in particular "World of Warcraft". I've always made sure that none of the vents are blocked, and now in the third incarnation I see where HP has added more vents, a third cooling fan and the rubber feet on the bottom are taller to keep the box up higher off the desk. So far this new machine has not had any problems running any app, they seem to be getting better and better, but I think if it's all-out performance you're after, go with a desktop. If it's portability you want, get a "normal" notebook. If you're looking for a balance between the two or have a limited budget (that's my case, could not afford/justify buying a desktop AND a notebook) then go with a "desktop replacement" notebook. Also be aware that this type of machine is HEAVY - my load clocks in at over 20 lbs. when travelling with what I consider "necessary accessories", 10 of which is the machine itself, and that battery life is poor, maybe 90 minutes if not taxing it, 60 if playing games.