In reply to J Brown:
I'd say it's probably worth the drive down to Stanage and the Eastern edges to get the best from Grit.
Slipstones is nearest and is a fantastic crag for bouldering and there a handful of great routes at HVS/E1, but other than that for leading it's small and limited. Almscliffe is a good crag, but it is tiny (width-wise) compared to the Derbyshire edges. Yorkshire grit in general is much harder to get on with for leading than the Peak, with many north facing, scrappy crags - but the bouldering is very good.
At Stanage, I would warn you that there is a possibility of disappointment if you stick to the totally classic easier routes at Stanage Popular, say. While it's obviously an amazing crag with so many good climbs all packed next to each other, some of the easier ones are very polished and can leave you wondering what on earth the fuss is about. On grit, it's the jamming cracks and scary slabs that tend to be most memorable.
Some good VS routes for a first visit, I think are:
Stanage:
Hargreaves Original Route - ever so rounded, but plenty of gear (cams)
Hell Crack - intro to grit jamming
Count's Crack - a real deal gritstone crack
Wall End Slab - intro to scary slabs...do try not to fall off!
Froggat:
Sunset Slab - just tickles HVS, but it's hard to say 'cause it's easy but with no gear
Broken Crack - a complete sandbag, a real grit crack
Tody's Wall - just tickles HVS, a route that packs a lot in
Chequers Buttress - if things are going well, this is a great route, fairly easy at HVS and everyone really loves it because it's superb and spectacular
Curbar: avoid the place like the plague. It will beat you up.