While I can't comment on the Sun Fast, I would also agree that the easiest to sail, decent performing, single-handers in that size range will generally have all major control lines lead aft, the traveller and mainsheet controls in the cockpit just forward of the wheel, and the genoa sheet winch just forward of the wheel as well. This ususually means stepping over the traveller, but it gives you much better sail shape control without having to run around the boat. In some cases, where boats are cruiser-racers intended for single-hnading, the spinnaker sheet winches are purposely sized the same as the jib sheet winches and are placed near the helm.
In Europe you also have access to a range of purpose built offshore capable, single-handed racer cruisers. These are a little stark, but they are fast and pretty easy to handle.
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Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay and part-time purveyor of marine supplies