Wow, sorry to hear that. At least it sounds like you escaped injury, which is the important part.
As for the VX, as I understand it the general rule for insurance companies is if repairs get near 75% of value they look at totalling the vehicle. What I'm also discovering is that most auto-body places ramp up the estimate to not have to deal with a unique vehicle. Since the VX is body-on-frame it's pretty easy to do body work on, far easier than most shops let on. (Hopefully Chopper will chime in here with his expertise!)
Good luck and hope it works out so you can restore your VX to original condition!