I agree, all 7 active users will say that Aros is useable
SLAP! ;-)
AROS has become very mature. Icaros is a good place to start.
http://www.icarosdesktop.com/dl.htmYou can install it to USB thumb drive (just plain AROS or Icaros) now and so you don't need to fuss with multiboot HDs if you want to use it on you Windows box. Read and write regular old Windows thumbdrives (fat32/16) so it is easy to transfer files back and forth.
You can buy a 100% supported x86 board just for AROS or test it on the hardware you already have. So it could cost you nothing or maybe you spend $150 for a brand new modern motherboard. Still nicer than on old Mac and $150 OS.
OWB for web browsing, mplayer for watching DVDs/movies, painting, 3D modeling, games, etc. Part of AROS is Janus which lets you use all your 68k Amiga software right on your AROS Workbench.
AHI sound, networking, real 3D hardware acceleration (assuming you have the right hardware). AROS is here and in many ways has more to offer then the alternatives. And at a cheaper price.
The WiFi bounty is due to be finished in ~September I think. I think that is when AROS is really going to grow. Throw it on a USB and surf from your laptop. Yep the present and future look bright for AROS.