well, since i had no video when i bought mine, i would have to say that my deciding factor was the quick and friendly response from the early empeg team. Any questions i had, no matter how small, they envested some time into their response, making sure i understood what was going on.
As for buying... honestly, my first thoughts, about a year before the first production was made, i said, "that's the stupidest idea! ... a computer in your car!.. who would do that?" ... then within that year, i began to collect mp3s, and saw the power and potential of what they were taking about.
By the time my chance to get one arose, i was able to convince 2 other friends to get one, and i ordered 3 at once! then when the new mk2's came out, we all got upgrades! It's great! ... i'm going to get a 2nd markII as a spare. i don't know how i would replace my mk2 if something were to happen to it, esp now since they're not making anymore!
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-CHiP