Rich, I have to kindly disagree. I have a 14 inch diameter prop with a pitch of 18 now, and I have a hard time planing out - or getting out of the hole quickly. I know it's not the engine because I have a 350 hp V8.. The problem is the pitch...
I have read that some wakeboard boats are coming stock with a 17 pitch prop, and many owners are upgrading to a 16 or even 15.5. 15.5 seemed a bit much for me, but is recommended if you are planning on running more than 2000 lbs ballast and don't need much top end speed. I run 1750 lbs ballast now...normally a group of us to add extra weight to the boat, but still want to maintain a bit of the speed. That is why I will stick with the 537..
Garri, I re-read your post - you have visited the wakeside post - which recommends the 857... I recommend calling your dealer and asking their opinion.
When considering prices - check this link out.
http://www.boarditup.com/shop/item.asp?itemid=288 Wakeside has the same props for $412.00
by the way - where are you from? km/h??