You dont need all surround speakers to go down to 30hz or below as your bass mgmt will take care of that and information that low and in surrounds will be non directional. Its just not practical for many to match all speakers or get speakers that size be it budget, space, waf or whatever. You should no doubt look in same line of speakers to find a surround solution or at minimum pay close attention to drivers and select speakers as similar as possible. You wouldnt want to mate a ribbon tweeter with a metal dome for example.
Best surround speakers for music?
Need help finding wall mountable(not deep) surround speakers for a fairly high end HT setup that will be music oriented. So far Sonus Faber Auditor Elipsa'a and Revel S30's are on the list. I would not be seeking dipole usage. Unfortunately the front speakers will not be matching the rear speakers but they sure are good(Kharma). Any other ideas for high resolution without coloration? The Sonus may be too soft in my case. Any ideas will be appreciated.