I'd like one also, but with two kids in college....not yet!
A little while ago I contacted Max-Prop. This was their recommendation (I have a 27hp Westerbeke - and clearly the prices may have changed since this email):
Thank you for expressing interest in the Max-Prop. Based off of the information provided the following props would be recommended:
63-314 (63mm 3 blade classic 14" diameter): $2500.00
63-215 (63mm 2 blade classic 14" diameter): $1650.00
In regards to performance both the 2 and 3 blades will perform the same in flat calm water. However, in rough seas or adverse weather conditions the 3 blade will perform about 30% better than the 2 blade but of course it will also create a little more drag being that there is 1 extra blade.