My current lame system consists of a Sony STR-D615 Dolby Pro Logic receiver, a Panasonic DVD-RV30 DVD Player, Pinnacle AC-600 bookshelf speakers, and Advent AV-5 center and surround speakers. Our living room/home theater room is roughly 12x12, nothing extravagant. I think I should begin my overhaul by replacing my archaic receiver with something a little more up to date. I'm looking at the Panasonic SA-HE70 ($169 shipped) or the Panasonic SA-HE100 ($241 shipped). I'd also like to add a subwoofer to the mix to begin to experience that "true" 5.1 surround sound. I'm looking at the DLS 10" powered subwoofer from PartsExpress.com ($99 shipped) or the Sony SA-WM40 ($156 shipped). Does anybody have insight into the quality of these two systems? Does the Sony offer enough upside to warrant the add'l cost? The final phase will be to replace the front and center speakers with something appropriate for the previously mentioned upgrades. I'm wondering if the JBL N38's ($200 shipped) and the JBL N Center II ($118 shipped) would be acceptable. Any advice in this area would be appreciated. The only other option to overhaul my home theater experience would be to purchase a HTB, such as the highly regarded Kenwood HTB-505 ($423 shipped) or the Onkyo HTS 650 ($550 shipped). Is the component solution I'm looking at preferrable to the HTB solution? Am I on the right track in thinking I should replace my receiver and add a subwoofer first? Any advice you can offer would be of tremendous value to me. Thanks!