Re: Cleating the Sheets...
Cam cleat or horn cleat, but not both. Pick one or the other. Advantages to cam cleats (without bullseye) are as other posters have said. But keep in mind that cam cleats are mostly limited to securing sheets in smaller boats, up to about 20' or a little larger. At 26', the loads on your sheets are getting high and the small bolts used to secure cam cleats may not be up to the job. Of course, with 4 or 5 wraps on the winch, there isn't that much load on the cleat.
I'd probably stay with a horn cleat and a single locking hitch. This is in conflict with conventional wisdom that says that locking hitches are not used with sheets. My counter argument is that 5 or 6 wraps on a cleat take longer to release than a single properly made hitch.
We have self tailing jib winches and never use the horn cleat sitting next to the drum. But on our last boat, we had standard winches and cleated them on a horn cleat.
Sabre 38 "Victoria"