Congrats on your 300'th post bud. I'm glad this thread is being revived, as the speakers are pretty good for the price they cost.
@Mauricio: while you do have a point that a "true" active, dual-amped speaker would be "better" than the current version of the MKIII's, it's really the quality of the amplification that matters more than the number of amplifiers we have. To be fair, while speakers like the KRK Rokit x's are truly powered speakers, they don't actually sound that much better. They can push out more music with more power, but generally we're not going to be using the MKIII's for house parties.
I guess what I'm trying to say (and I'm sure you know this already) is that, yes, the MKIII's may be better if it had two amps rather than one, but for most desktop solutions, it's enough to have just the one amp in the left speaker. If we wanted to get a true hifi system, I'd say go for some Cambridge / Quad-11L's and a small Jolida amp. It'll run you around 500 buckaroos more, but it'll sound much, much better.
Second off, I am a bit insulted by your remarks about impressional noobies. It is my firm belief that one cannot obtain true "monitors" for your desktop. While it may be that speakers can sound accurate and faithful to the reproduction of music, desktop speakers simply cannot compete with the power, beauty, and elegant reproduction of music from real bookshelf speakers. I've heard system that range from $50 to $80,000, and I'm absolutely certain that most desktop systems with an onboard amps (or four) can't compare to a full stereo setup.