I currently have Studio 60's being run by a Marantz SR-8200 receiver. Question: Better to upgrade Studio 100's or Get a PS-1000/1200 and keep the 60's Sonically, should the above combinations be about the same? Obviously, the sub would have lower response than the 100's by themselves. Can anyone with a PS series sub and studios tell me how well the sub integrates with the speakers. Thanks.