your s1s are really excellent, big sounding little speakers which have all the characteristics you cite (definition, clarity, etc.); they're also very flexible about placement. i'd keep 'em and add a sub--paradigm makes good ones in the same signature series which ought to integrate well with the monitors.
Monitors or floor speakers for small room?
I have a rather small room, 22 x 12, lots of glass and a marble floor (partially covered with area rug). I want the best sound that i can get, definition, clarity Etc. I have paradigm signatures (1.0). I would like to buy the dynaudio C-2 signatures but after seeing them think that they are WAY to big for my space (my listening area would be 6-8 ft from them). Question is would a really good pair of monitors give me what i'm looking for. I don't play rock music but want a decent bass-maybe a sub?