Surround speakers options?

I currently have a 2 channel system but I'am picking up the pieces I need to set up a HT. My front LR are Devore Silverbacks and I just got a Devore Gibbon 7.1 for my center. This will give me a Timber match across the front. I now need to locate some surrounds that are Dipoles, Devore does not make this type of speaker so I would like to know what to expect if I get a pair of Revel S30 for my surrounds. Will I notice the difference since they are not a Timber match to my fronts or since they are a diffuse type speaker will they blend in? Also they have a different sensitivity But a AVR should be able to set the levels to sound the same in volume correct? Thanks for any thoughts you have. Gary