nice vids of the prophet 08, i own a tetra, and if u do pick up a prophet 08 deff spend time hooking the 2 up together for a 12 voice poly analog. i am sure you will love that! i also think that if you have a mopho with keys you can have 5 voice analog poly all ready wich is all ready pretty cool.
my two dave smith instruments i own, the tetra and evolver desktop i use the sound tower programs for, i strongly suggest them, even the free versions are good, the pro (one that cost cash) is of course better, but i really love their programs, and i am sure so do a ton of people
ps another option would be getting a juno106 and dropping the kiwi106 board into it, (drop as in spending a whole day de sodering and re sodering) there is a company on ebay which will do it for you for under 200, wich turns the juno106 into the kiwi106 and it is just as good as a modern day poly synth imho as the prophet 08, well to be fair i also have the kiwi patch editor too, so that gives me all the hands on knobyness that i need/love