I have a chance to upgrade my 26TX for a very reasonable amount of money. My options are for a 43 or 45. The 45 will cost me $120 more than the 43. I'm doing my research and reading up on this forum. Yes, I did do the searches. I've also downloaded and printed the spec sheets from Pioneer, where there is only a $200 MSRP price difference. I'm trying to understand the differences to see if the $120 (which is NOT a trivial amount of money for me) is worth it. Power, amplification, channels, decoding modes, THX certification, processing, and construction all look identical. 45 has auto MCACC, which a lot of people have said is a very valuable feature for set-up. I don't have an SPL meter, so I might like this feature. 45 has some additional "Convenience" features, but I don't really know what they mean (e.g., MR/MS w/ Front Panel Control). Seems to be a wash here. Do they both have the Illuminated Smart LCD Remote? 45 has RS-232 and USB connectivity. I have no plans to use these. It has an extra optical input, which I don't need. Does the 43 have Component video in/out feature? Do either of these receivers have Speaker B setting, for outdoor speakers? I'm in the process of downloading the user manuals for each, but appreciate any responses. Thanks. BTW, I currently use 5.1 speakers, have TV, DVD, VCR, and Sat as inputs; TV monitor as output. Use S-Video connections. TV is not component compatible. Specifically: I have Paradigm speakers all around (Phantoms, CC-270, Atoms, and PDR-12). I currently have the following components hooked up using S-Video: DISH Network satellite receiver (older model w/ digital audio output), Pioneer DV-525 DVD player, Mitsubishi SVHS (use about twice a year), and the audio from my Sony 27" (non-Wega, non-XBR) TV (for OTA signals).