Hey Mattp
yes the Igo4 is kinda neat what with that charging stand and should work fine, some things to think about though
1. what happens if the charger goes bad, can you get a replacement easily (I could not locate any info on it in regards to using a regular ego style charger)
2. can you get just the battery by itself? (backups for backups is almost as common of a chant here as oooohhhmmm is)
3. I could not find a vv version of it (truthfully, I didn't look very hard)
all said and done I am sure it is a very good setup for around the house but I would not want to take out on the road very far do to it needing such a specific form of charging (which is an additional point of failure) just as I would not jump into an all electric Prius to go coast to coast in (it would take weeks - drive 120 miles - stop for the night to charge - rinse - repeat)
Just my 2 cents
Welcome to the ECF