Tbh I quite like the Asus all in ones. Except for the fact they're all using ATI. ATI drivers on Linux is even more of a hateful experience now than it was 5 years ago.
I've not used Linux much to be honest. I keep going back every now and then to give it a go but I can't avoid Windoze. I'm an OU student and need to use OU software, my vinyl cutter has crap linux drivers but solid Windoze ones too, and so on. Having said that I don't try too hard to have the latest spec, I just don't need it. X86 and Windoze is for compatibility as far as I'm concerned.
Amigas (SAMS and Natami included of course) are for pure fun but the more I can use them the better.
I'm going to need another PC soon however, something portable to plug into an astronomical telescope. Again, Windows has a massive amount of high quality and mostly free software for astronomy and cheap hardware to run it on. Closer to the time (Febuary 2011 at the latest) I will take a look at other OS offerings in this field but I think a Windoze solution will be hard to beat, the amount of free software available for astronomers is truly breathtaking.....
...I'm pretty sure the PC will not have an Amiga sticker on it however. XD