I just have an Acer Alpha550 Laptop with a 1GHz PIII processor, 370mb RAM, Win XP and a very nice 15" 1400x1050 display.
I honestly get on with WinXP better than any previous version (except perhaps Win2k) once all of the eye candy and other rubbish is dissabled.
I also run Connectix VirtualPC and use that to host Vector Linux 4rc2 (under which I'm currently playing a lot with AROS), QNX Neutrino (I'm currently playing with it as I might need to do some printer driver development) and Windows NT4 and 98 (tor compatibility testing mostly).
I also tend to use WinUAE quite a bit.
I also own 1 dead A1200, 2 good ones and 2 A1000's. Unfortunately I seem to have the touch of death when it comes to Amiga accellerator cards so they are all now barely expanded and, as a result, barely used.
I seriously hope my next machine with be an AmigaOne with AOS4 but MOS certainly looks tempting too.....
