Thanks for everyone's input. I'm going with the 68". Prior to the Phantom it was a 68" Connelly so it's been over 20 years with that length and no complaints. I also came across several comments here that said, "when in doubt, go with the bigger ski". Seems like good advice.
The plan now is to transfer my existing Animals to the V-type, get accustomed to the ski, then decide if new bindings are in order. Of course, that will be some time after today's blizzard passes through.