I just bought one during the last PC Fair in Penang

quick review:
trebles are sharp just the way i like it, volume is sufficient for me, i rarely go above 1/4 of the dial but it can go to maximum with no problems (other than the complains from my neighbours)
bass a little soft but that's because i don't crank it up but comparatively at maximum it's softer than my Altec Lansing 221. Not an issue for me, because i'd complained that my AL221's bass is too heavy for me
my few complain is that the S2.1M is freaking heavy (but probably still lighter than the new S2.1MK2), park your car nearer if you are buying one. the other thing is that the piano finish attracts fingerprints and you have to spend time wiping them off.

now i feel like changing my onboard sound to a M-Audio Revolution. it is probably holding back my sound system.