I guess the point being made is that for that much money (which I wish I could ever have, heh) you can get a lot more bang for the buck.
If mobility is that much of an issue, how will you even play PS2 games on the go like that? Will you carry a PS2 controller with you as well?

Cause I'm amused if anyone's playing emulated games with a keyboard. Good way to develop carpel tunnel, heh.
I do these types of builds for people with more money than time, but I only work with desktops. Notebooks are far too many headaches and after-purchase tech hassles (OMG X DOES NOT WORK! WAAAA!) than it is worth. This is especially prevalent with the mobile video drivers.
Amusingly, I've had all my clients sign a waiver that absolves me of any current or future tech support responsibility if I determine that their issue is due to any pirated software.
So I've had more than a few kids with rich absentee parents asking for a $3k+ computer beastly build and then whine that it doesn't run X emulation so I ask em to bring it over, I hook it up and more often than not I find pirated stuff on there. Then they try to demand a refund (hah) and I tell them it doesn't work that way.
They're just lucky I don't report em for it. >_>