My Thorn Raven Sport Tour, identical in framework to LEE's above, I think. I have flat carbon bars and a sprung saddle as well as a carbon seat-post. Some people question the aesthetics of Thorn bikes, but I've never ridden anything so comfortable and that's what counts. It's not fast, but that suits me fine, and I can ride it all day.
The Mercian is also very lovely, and I rode it on this year's Dun Run without problems but I reckon the Thorn will be the bike that I keep on riding until I'm too old to ride a bike any more. I also like the tandem, but it's not so comfy as the solo Thorn.