B~C
Cavu Ken is really right, and for two times $300 or so you'll be indestructable (except that the SS props cause internal damage in the gearcase sometimes because they don't yield themselves).
Id'd go with Solas 4 blades myself instead. Less expensive, perform like hell, reasonaably safe during and after a collision, just don't chop logs up into particle board makings as well as SS.
In less dangerous waters, the Pro-Pulse would be a great choice, especially if you need to change pitch because of altitude changes occasionally as they have adjustable pitch. On the other hand, Bill and El made their SW Alaska / Inside Passage trip on them w/o any hits, so go figure the real odds of wiping both props out simultaneously.
The cheapest solution would be to go to ebay and buy another Comprop for about $50, then buy another for a spare. Not bad, either.
SS..............Solas 4Blade Al...............ProPulse........Comprops + Spare
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No Worries, Mate! Lotsa good choices!!!
Joe.