So I've got 4 Mackie HR 824's and an M & K vr-1250 sub so far in my setup. These are studio quality (albeit outdated) and they sound pretty good in my opinion. However, I was looking into picking up a center speaker for the setup, and have seen a bunch if flack or and against this if it involves mixing brands. What does AVS think? Can I run a non-mackie center with the set up and if so do you have any suggestions?