In reply to SenzuBean:
> I'm quite happy to plan my own route, but for example if someone asked me "I'm looking to get a nice QMD in Snowdonia, what would you recommend?" then I'd say "Oh, well there's nice routes on the Glyders. The Carneddau make a nice day out. I also recommend the Nantlle ridge - great little place that's usually fairly empty" - etc.
> I'm not asking for a .gpx file or anything (not that I even have a GPS)
Excuse my confusion but you asked for a route in your OP.
If you want a solid couple of days on the moor I would suggest starting from Princetown, Two Bridges or Postrbridge and look at doing a loop around the North moor encompassing Fur Tor, Cosdon, High Willhays, Yes Tor, Great Links Tor, Tavy Cleave, Lynch Tor and Great Mis Tor.
That will give you some nicely varied terrain, plenty of interesting nav, camping options and lots of historical interest.
I hope the information on the ranges was useful.