I am upgrading my Titans & CC-170 to Studio/20s & a Studio/CC. I currently have ADP-170s as surrounds. My question is how well will the ADP-170s mix with the Studios? I know the Studio/20s and ADP-170s aren't timbre matched but how important is it to match surrounds with fronts? It would be possible to also upgrade the ADP-170s to Studio-20s but I'd rather not pay the extra $ if not needed. I think the increased size of the Studio/ADPs over the ADP-170s would be difficult to sell to my wife. I plan to stick with whatever I upgrade to now for a long time so I don't want to end up with something that is a problem.