If you listen to much Symphony, or Rock music consider keeping the subs. Rock music in particular, has a prodiguous amount of bass and beats-per-minute. Reproducing low/mid bass with the smaller woofer/midrange units may interfere with midrange reproduction. Subs do tend to open-up the soundstage but may not be necessary for chamber music, jazz, Blues, etc.
I choose a cutoff of about 120 hz (48 db/octave) for Rock (my main speakers have 8" woofer/midrange drivers). I can move a good bit of air while not unduly burdening my 8" woofer/midrange drivers.

