Large catamarans do pretty well, provided you don't load up all the space they provide you with stuff... they, like all multihulls, are fairly weight sensitive. You might be interested in reading the following article
, which is about a trans-Atlantic passage, albeit on a Gemini 105Mc, which is a smaller cat than you're looking at.
Some points about cats though.
One, they tend to be harder to tack than monohulls or trimarans. This is due to the extra windage the cats have, as well as the fact that they don't have a central pivot point, like monohulls or trimarans do.
Two, they are weight sensitive. Loading one up will generally get you a boat that can't get out of its own way.
Three, marina costs for them tend to be higher, as they take up a lot more space than a monohull of comparable length. Maintenance costs can be higher as well, since they often have two diesels, rather than just the one found in most monohulls.
If you're serious about looking at catamarans, I'd recommend you read Chris White's The Cruising Multihull, which is an excellent primer on larger multihulls.
I hope this helps... as a multihull sailor, I'd be happy to answer any questions you might have via PM.