I suppose it depends on where you are and how bad the remaining winter will be. If you prune now and then there's a hard frost, you may get die-back on some branches. Personally I would wait until February or so. If they're really annoying you, or if there's danger of wind-rock or something like that, then you could always cut back a few branches now - just removing part of them - and then wait until later to do the proper pruning