If you plan doing the Manaslu trek and Tsum valley, I warmly want to recomand you the following agency http://www.nepalplanettreks.com
We got our guide here. They charged us a reasonable price and gave us a wonderful time. Our guide was sensitive for our wishes (we liked homestays and quiet places, sometimes we preferred to walk longer and to some extra ordinary destinations), and helped us a lot. He was allways friendly to the locals, never drank any alcohol and helped us also to carry luggage when we have been tired. Thanks very much to Sanjib from Nepal planet treks. Next year again!