Don't know if this has been answered before, i looked and didn't see anything. Would it be alright if i used dipole side surrounds and direct radiating rear surrounds, or is it a bad idea to mix 2 different types of speakers for surrounds? I want to upgrade my 5.1 to 7.1, i have paradigm reference studio all around and i'm not sure if i should get the adp or studio 20 for rear surrounds. The performance of direct radiating surrounds for multichannel dvd-a/sacd is of no issue to me, this is strictly for home theater.