In reply to lukesaddler: I reckon the best bouldering venue in the Peak at that range is Robin Hoods Stride and Cratcliff. There's lots to go at in a lot of styles. Plenty of soft touches too.
As for classic problems, there's a clutch of good aretes, the best being the stepped arete on its left and Brain Dead (which apparently climbs on its left, not stepping in on the right at about 5+/6a as I've always done...is this true?).
Razor Roof is a classic soft 6c crimpy/slappy problem.
The cave has a reasonable soft 7a sloper traverse type thing.
There's a lovely soft 6c problem up the front of the pointy boulder.
There's a horrible hard 7a slab next to the stepped arete. Prepared to get very frustrated if your boots aren't very stiff.
The Egg has some great problems, the best being the weird arete.
You're going to need a guidebook to find these problems by the way.