In reply to Landy_Dom:
I'd wait 'til Spring and go to the Roaches. I think doing trad in winter is an enormous waste of time anyway, but additionally the Roaches gets green. It's a wonderful crag with lots to explore, and not far from you. However, it's perhaps a little harder to seek out the routes at those grades - but given the size of the crag, there must be plenty.
Basically all the major grit crags have plenty to do. Stanage has the biggest and best selection of excellent routes all next to each other, but it's better to go on a quiet day. It's freezing cold in winter. Froggatt is a bit more hospitable in the cold, and has lots of good, clean routes in those grades - in fact, it's particularly good for HS cracks. Birchen does have lots of easy routes, but it's a bit of a funny crag I think, with a particular style of very gentle, rounded slabs guarded by a fierce steep at the start. The routes are shorter than the other crags I mentioned and it has more of a 'beginners/groups' atmosphere.
In winter, Rivelin can be a good bet as it's much lower-lying than other crags and faces the sun. Some stuff will be green and damp though.
But bearing all that in mind, I'd still invest in a bouldering mat instead for this time of year. By the time you've found a route that's dry and racked up, you're already freezing cold and it's gone dark.