I am looking for relaxed flat sailing, actually

Tri owners I spoke to promise that it, like any multihull, can be sailed flat and feels a lot better at anchor. I think, though, that speed is something that should be directly under control - it isn't hard to sail *slow*, I don't mind reefing early and often

Going fast, on the other hand, is not always an option on another boat.
Anyway, I scoured the listings and the specs. It's either this or a small shoal draft monohull. Since I had a few of these in the past - they just don't seem like something I want to try again, unless I have to.
The cockpit space, on the other hand, is an issue and I do think based on specs and photos at least, that F-24 actually has a decently sized cockpit, open at the back - which is a good thing. F-27 seems cramped. In fact, even F-31 has a cockpit that to me seems very undersized. I think they tried to increase interior space - which is a good idea, but not at this cost.
From experience I found out that I spend most of my sailing time in the cockpit (though I do like to have a shade over my head). I really only go down below to check instruments and, may be, cook when anchored - and sleep, of course. Since long-distance cruising for various reasons is out of my plans in foreseeable future, interior space is not quite so important anymore.