Haven't heard the PSBs but would expect them to have a better, cleaner midrange and highs. Similar I'm told to B&Ws in that price range.
I demoed the 8060s next to some B&W 683s. The 683s were clearly superior sounding (to my ear) in the midrange and highs. It was almost as if the 8060s were playing through a thick blanket. I'm told the PSBs have a similar sound to the 683.
The 8060s though sounded fuller, had a near 3d affect (in the room I was in) and were much warmer sounding. For HT the 8060s would do pretty good without a dedicated sub and for 2 channel listening they were really nice, I just preferred the midrange and highs of the 683s.
The PSB probably have more low end than the 683 but you'll need a good AVR or amp to get it out of them. The 8060s can get by with much less power.
If he has decent power the PSBs would be my pick. Might eventually want to add a sub to the mix though.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron