This is from the B60 manual, the B60 was my first piece of high end gear when I was first starting out nice integrated.
"There is a quarter inch stereo (3 conductor) head-phone jack available on the front panel of the Bryston B60 integrated amplifier. The headphone output is driven directly from the preamplifier section. We recommend the use of headphones with input impedances between 50 ohms and 600 ohms. Headphones with input imped-ance values above 600 ohms may experience some problems attaining sufficient volume levels. The main outputs, both balanced and single-ended, will be muted when a phone plug is inserted into the headphone jack. TAPE outputs are not muted."
The preamp section of this integrated is robust so you will be fine driving headphones. As far as speakers go tons of options once you decide.
"There is a quarter inch stereo (3 conductor) head-phone jack available on the front panel of the Bryston B60 integrated amplifier. The headphone output is driven directly from the preamplifier section. We recommend the use of headphones with input impedances between 50 ohms and 600 ohms. Headphones with input imped-ance values above 600 ohms may experience some problems attaining sufficient volume levels. The main outputs, both balanced and single-ended, will be muted when a phone plug is inserted into the headphone jack. TAPE outputs are not muted."
The preamp section of this integrated is robust so you will be fine driving headphones. As far as speakers go tons of options once you decide.