Having spent a fair amount of time (during those few instances when in climbing mode anyway) on highball projects lately, I thought I'd pass some on..
This baby is a suitable height with an okay landing and a reasonable short walk-in.The, ah, obvious seepage issues shouldn't effect a summer ascent (this was taken in November). You could lead on it as there are cracks, but pads would make it nicely exciting. Its located on the old miners path into the quarries from Nant Peris, the high one, not the tourist drive through, and is visible from the car as you're treking off to the pass. Nowt too tricky, but a slopey topout.