In reply to mop449:
Third Sister
Third Sister to Zulu Zawn is a very clean and quick drying, non tidal, Sports crag with excellent routes, some great low 6s (good warm ups), a classic 6c
Twlight World (6c) and several great looking 7bs - could be a good option.
The most recent Rhossili developments are not in the recent selective guide, but topos are here:
http://www.southwalesmountaineering.org.uk/wiki/Rhossili_Sea_Level
you need a good spring low to get a decent climbing window, especially for Mermaid Wall, you probably get an extra hour either side of the low at Shipwreck Cove (perhaps 6 -7 available hours here with a spring) which may be of more interest at your grades.