I like the idea of the XPS M2010. I seriously considered it as a Windows MBP 17" backup, as I don't carry the MBP around and I do use it as a transportable desktop. I was also interested in OSX86 for a while but it's not a professionally practical way of running OS X... it's more for nerds to show off and cock a snook at Apple. The XPS is a more powerful machine than an MBP but is luggable. It is basically a luggable all-in-one LAN party machine. Of course individual components may not be easy to replace but are they on an MBP too? This is probably not a machine for people who only own one PC: but is a rather nice niche product.
I did decide however that I did actually want a degree of luggability beyond what the XPS offers. I was also looking at the Samsung M70, which offers a detachable 19" screen while maintaining the normal laptop profile.
In the end I purchased an HP NX9420 to back up my MBP. Same core hardware specs essentially, but better built than the MBP17", a higher quality item, runs cooler, and is upgradable to a real warranty for minimal cost. I also like the crisp, businesslike styling almost as much as the MBP's sleek form. It's not anywhere near as showy yet it looks like it means business. That's more "me". It would be absolutely ideal if I was able to legally and properly run OS X on this machine instead of the Macbook Pro but that ain't going to happen.
For most things not involving my personal amusement, I've come to the conclusion that I'm fairly OS agnostic. OS X is more personally productive in certain aspects and I do tend to turn to the Mac for doing research where I'm looking at lots of different things in one go, but I don't find Windows overtly onerous either. In fact, based on the unreliability of Apple hardware (and most importantly their inability to support the hardware to the standards I'm used to) I've virtually switched back to Windows - the Macbook Pro and the Mini are all the Macs that are left from my initial almost total conversion.
