Well the only electronic thing about no-man, is their breakbeats, but they only incorporated that on their first couple ep's/albums.
So I wouldn't say that they make electronic music.
As for Bass Communion, go for I, II, and Loss. Together with Ghosts... those are the best albums Steven Wilson made within BC.
Oh and of course, you SHOULD check out Continuum II, if only for the first track: Construct IV.