I looked at vB for my forum when I decided I needed to get rid of phpBB. It was around the time of the price hikes and the release of vB4 and I decided MyBB was a better option mainly based on the price increase. Had I looked 6 months earlier I'd probably have stumped up for a vB licence. No chance of that now with the way vB4 has turned out. I've never been keen on IPB so for me the best option, paid or free, is MyBB.