I shot an O\U for a few years then moved to a SxS as they just felt better to me, O\U now seem very dead in my hands. I shoot as well if not better with the SxS. This may be rubbish but I think you are more of a natural shot then a SxS is the way to go. Great for walked up shooting as well as more comfortable to carry all day.
Down sides, more noticeable recoil and muzzle flip, I switched to 24grm steel loads for clays and that made it much better.
Pick up a few in the gunshop and see how they feel, they are usually cheap enough as most folk shy away from them so you get a lot of gun for your cash. I think every one should at least try a SxS for a round of clays, lifes to short not to know what it's like!!!!!
Cheers
Flipper