Not really sure which is better.  We bought our 2006 220 Horizon in mid-July and it came with the VP 5.7 liter, V-8 with single stainless prop.  Before buying the 220.....I really thought about getting the 220 with dual props....but got the one with single prop for a really good deal.  Anyway, I'm a big guy.....6'5" 270....and have two kids both good size.....throw in my wife and a few more passengers and we still have great power for pulling people out of the water.  I've been really happy with the single....so far.  Hope this helps..... 
