From all my boatlooking, there's a couple that get it right. The Kelly Peterson 46 and the Stevens 47 both look good and from all reports sail well. One of the big advantages of a center cockpit is that you usually get a decent engine room out of it, so you have space not just for regular maintenance but also for addons like a genset or watermaker or multi-stage fuel filtration.
AStevens 47 has a God awful center cockpit. It has no seat back height.
I'll vouch for the Stevens having no seat backs. I don't know if my back has yet recovered from a six week trip in 2008. I hated that, but overall the boat got me to be more open minded about CC's. She sailed well, though she should never have been converted from a cutter to a sloop, there was too much lee helm.
We sailed in some pretty extreme conditions at times, even a gale half way to Hawaii, I found her to rather dry, and we spent a couple of weeks going to windward.
Engine access was great - you could get complete access to front and both sides - essentially the galley, navstation, salon was the engine room once you took off the wraps.
The aft stateroom was quite grand and the aft head was great at sea also.
I used to Dismiss CC out of hand, but now I am willing to look at the bigger picture. They don't all sail like crap, that's for sure.