In reply to Richard Hession: i'll indulge you though if youre doing Font 8a im not sure that i should. as suggested, Dinbren is a great spot with some excellent 7s. all, from what ive done, are worthwhile but the standouts for me were:
Technicolour Yawn 7a+
Ice 7a+/b
Walking with Barrence 7b
I Punched Judy First 7b+
The Bandits 7b+
further afield your next best bet is Pen Trwyn where i dont think theres a bad route. the Mayfair Wall has some quality 7s:
Axle Attack 7a+
Mayfair 7a+
Bloodsports 7b
these are longer than the Dinbren stuff so might be an ideal way for you to gain some stamina if shorter stuff is your strong point? by the way, while the Dinbren stuff is short its all fairly sustained, either physically or technically or both.
downstairs at Lower Pen Trwyn theres some more really good face climbing 7s, quite technical in most cases. theres also some burlier stuff, including some 'soft' 8as. I've Been a Bad Bad Boy 7c is pure class and you might find it easy with your power but it is quite sustained.
as mentioned, Geordie War Cry 7a+ on slate is very, very good but again quite sustained. nearby is Whizz Bang 6c (and not easy) which i think some people hate but i thought was great: short, technical and really bouldery.
enjoy!