Selling my b&w 603s3's and lcr600 to get the sa-1750's(pr).These things sound great.dont know if it's considered an upgrade or not.I will be using my rotel rsx1056 and hope it's up to the task.Will have to live w/o a center for a little while.Anyone with experience with the system audio please offer any opinion or insights.If you think it's an upgrade would like to know that as well.