In reply to Bonesaw:
Yes, I'd say take the 50. And make sure you read the grade notes before setting off as sometimes they have notes on them saying "This route requires a 60m rope."
As for other walls, Alien 1 and 2 are both good fun. 1 is top roped and leading and 2 is just bouldering. See
http://www.alienrock.co.uk/
Nick