It really doesnt get any better than the Canmore area's Planet X. Actually pronounced '10' like the roman numeral, this place hosts high quality featured blue/grey limestone of a overhanging nature. If long (almost 40m), steep, physical, asthetic sport climbing is for you then you cant miss this crag. Located high up the Cougar Canyon drainage behind Grotto Mountain, Planet X is in a beautiful, remote location that gives an awesome vibe while climbing there. The cliff gets almost no sun, so the warm summer months would be ideal. You need a 70m (atleast) for all the routes, lots of draws and some strong arms. The warm up's are 5.11's, similar to Acephale. Thanks to Derek Galloway for the topo and information.
Topo: Planet X - Rock Climbing Topo