The latest crop of 2010 home cinema amplifiers are the most comprehensively equipped and flexible yet. Even Pioneer's affordable VSX-920 (?500) has Bluetooth support, internet radio access, Dolby Pro-Logic IIz processing and an iPhone control app. So, how does the same company's ?1300 VSX-LX53 Here we are comparing Pioneer Elite VSX-LX503 to Pioneer Elite SC-LX801 to reveal their common strengths and weaknesses as well as the differences between them which will help you in making a correct decision before the purchase. Both receivers have 9 channel amplifiers. Let us have a look at some highlights of the models. Replaced an Onkyo TX-NR636 with the Pioneer Elite VSX-LX503. Have it hooked up using the bi-amp configuration. If using the bi-amp configuration make sure your speakers are able to handle a bi-amp setup (4 posts per speaker). The setup was easy and the sound is excellent. Download and save the online manual to a computer for future use. Pioneer Elite VSX-LX503 brings you the synergy of Dolby Atmos®/DTS:X ideally calibrated by MCACC, and the latest video standards. Ultra HD/HDR10/HLG/Dolby Vision™, and even expands to a 7.2.4 ch surround system with an external amplifier. I am not able to post links but you can find the manual on the Pioneer Website>Home AV>AV Receivers>Elite Receivers>VSX-LX503>Manuals Tab You can connect your Rear Surrounds to the external amp (Amp to the AVR via pre-out) and connect your 4 ATMOS speakers to the LX503. This will give you 7.2.4 (assuming you are still planning on 2 subs). The VSX-LX503 brings you the synergy of Dolby Atmos®/DTS:X ideally calibrated by MCACC, and the latest video standards Ultra HD/HDR10/HLG/Dolby Vision™, and even expands to a 7.2.4ch surround system with an external amplifier. FlareConnect™ offers wireless multi-room audio with easy control on the Pioneer Remote App, w The Pioneer VSX-LX503 is the perfect partner for your HDR-equipped TV and video sources. It supports HDR10, Do