from what i remember the virus version of upz's are the rtr model's. Nothing wrong with them though, the grey tongue is quite a bit stiffer than the black tongues . look at the tongue color on the virus boots. you probably should stay away from the grey ones. I currently ride the rc10's which have black tongues. they flex well for a 200 lb. person. of course other people will tell you, you may want a softer boot. I disagree.
Probably a good idea to go with a f2 binding or sno pro (or something like that). they are going to give you a softer interface, which will help in begining stages of carving. when it's time, go for the td3's with you're new carving board (what ever it may be).
that wcrm wide sounds like a good bet as well. but as far as length, I think go for the 174 over the 78. you will be able to maneuver a little easier.
for me, when I'm riding powder or bumps or trees, I ride a freeride board (ride timeless) with sno pro bindings. then go to the real carving board for the rest of the time.
I think the 4wd boards are cool but, you may want to consider just slapping plates on you're freestyle. learn how to ride with an alpine stance,then just buy a used carving board (try to find a coiler, donek, prior, just not too much sidecut, no more than 14) to get a feel of what you like. Of course it's nice to demo boards if you can.
just a few suggestions, hope my:barf:helps.