MV-8000 user here. It sounds like your already very familliar with Roland gear. Therefore, the MV may be a better choice to get up & going faster. That was 1 factor (among many) that sold me on the MV. Also, with the expansion card you get R-Bus to interface with your VS recorder.
And definitly check out
www.MVNation.com Loads of info there, you'll find me there as well.