Are Cats truly bluewater/long passage capable?

[sundowner]

Not just any cat, but something in my price range (used but in good condition, 32' to 43', and between ~$100k to ~$200k depending on year, length, config, and condition). Can a Lagoon 38 or 42/43, Prout 37 or similiar cross oceans "no problem"? Can they actually handle heavy seas, waves, and weather? Could a smaller PDQ 32? Are most modern/recent cats strong structually and very sound? If I buy a boat, I'd ultimately like to take 3 to 4 years and be able to go anywhere. Would you choose a nice monohull for the same price instead? Anyone know of any exceptionally good deals available? Thoughts?

Jeff