Cat vs. Mono - The Great Debate | Sail Feed
I assumed most people have seen that by now. But it's an experienced well-written opinion.
Aside from buy-in price and docking price, and suspect build quality on random models, catamarans seem like the way to go for cruising.
Now, if you live in a small sailing area and just go out for day sails, maybe you want to go slower (on a mono) so you don't run out of space. That's the problem I occurred with my old beach cat.