 steering roll
The most unpleasant characteristic of cats that I've experienced is opposite lean in turns (turn the boat left, the hull leans right) because the outboard side sponson gets more weight transferred to it and makes it "carve" a deeper track than the inboard. No chance of the boat flipping or anything, but it always feels odd. Worldcat says their new models don't do it; maybe Manny and the other cat owners can comment about the sensation.
Cats will be better in chop, are easier to manuever at dockside due to the larger motor separation, and usually better on fuel.
That said, I think they are a little lacking in rigidity compared to a good monohull. On August first I went around my Hydrasports with a screwdriver because we had already put over 1500 miles offshore this season, all of it running hard, and found two screws loose and 7 that could be snugged at all on the entire boat. There's never a rattle, shimmy or shake. Some cats I've been on get real flexible after a little time offshore.
You are in the difficult position of having a lot of boats you can afford. When it comes down to it, they're all pretty good!
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Frank
30' Hydrasports Vector "Jolly Roger" | 
