as someone who started out on a 20ft and all we do is surf, we will never go back to a 20ft again for surfing.
that's our opinion and you are correct in that the helix will toss a good wave BUT we prefer the longer hulls as you will notice a difference in the length/height of a wave from a helix and a max. and once you start "living" on these on a saturday the longer boats with deeper freeboard will swallow up all the crap a family brings for a day on the water.

and whichever boat you buy, whether it be a moomba or another brand, be prepared to spend a few $$ in upgrading bags or lead. almost every boat out there will produce a much better wave with more weight which is the reason they all have such tall freeboards today as compared to 10 years ago.

in the current state of the market(it's getting a little better) if you find a deal, don't hesitate as the boat you are looking at today and saying I'll make an offer tomorrow is the same one someone else made the same comment yesterday and is offering today. keep that in mind...