RE: best allround wavesail on the market?
About the rigging.... For the 3.7 SO i'd definately reccomend you to buy a 370 mast that is soft enough for it (16 imcs ?? ), so it will work nicer. I tried to rig mine with a 400 mast and it didn't feel quite right. 4.2 can go with a 400 mast (USE RDM ONLY!!! to me RDM's make a totaly different SO). I don't have a 5.3, do have a 5.0 and i use the same size and model of mast that i use for 4.2.
If i were you i'd listen to ola..... he knows what he's talking about. So take a look at the Smacks.
All the best!