I have been reading here for over a month on various aspects of home theater setup, but a question remains. How much of this stuff applies to the person with mid-level to lower end stuff? For example, I live in an apartment, and have my home theater setup in an open space room, rather than a custom built room specific to the use. My equipment is as follows: Yamaha HTR-5560 A/V Receiver Sony DVP-670D DVD Player JBL HLS Series Speakers (HLS810 Fronts, Center, HLS410 Surrounds) JBL PB10 Subwoofer Panasonic 51HX42 RPTV (4:3 HDTV) Given an equipment list like mine, would things like TV calibration and audio calibration (using SPL meter) make a noticable change? It is very easy to get caught up in the HT fanaticism, but hard to know where you will benefit the most. Any insight would be greatly appreciated seeing how I am fairly new to the concepts.