I ask the same question a week ago in an email to Sadoun Sales. Here is what they told me.
"The V4000 is still in development and won't be available for ar least 2-3 months."
I just about finished with my 1st BUD and not sure I can wait. Considering purchasing a V3000 for now and upgrade later. That still leaves me without a way to switch polarity in the Co-Rotor. Or I can manually rotate the 10 ft dish, a lot of trips out to the yard. (Kinda reminds me of the Ole Outhouse days of my life.)
Suggestions welcome.
Steve