both work well in a room of that size. the benefits from switching from paradigm bepend on which model you now listen to. a floorstander might have more of a longterm benefit. in general terms the spendor 'classic' line more balanced than paradigm, but there are floorstanders that are somewhat more full-range..that are also balanced. neat, castle,totem,quad,gershman,pmc,etc.....and paradigm's larger studio signatures. all can play fine in a room your size with pretty articulate deep bass as well.
