The Yamaha RX-V365BL is an entry-level model with two HDMI inputs and a $250 price tag.
Yamaha RX-V365BL back panel
Around back, you'll also find three component video inputs, three digital audio inputs (two optical, one coaxial), and four composite AV inputs (with no S-Video).
The RX-V465BL steps it up to four HDMI inputs and adds onboard decoding for Dolby TrueHD and DTS-HD Master Audio.
Yamaha RX-V465BL back panel
Around back, there are only two component video inputs and the RX-V465BL also lacks an analog multichannel input. The RX-V465BL has a $380 list price.
The RX-V565BL is Yamaha's least expensive 7.1 AV receiver, and also adds an onscreen display and 1,080p upconversion to the feature set.
Yamaha RX-V565BL back panel
The back panel is nearly identical to the RX-V465BL. The RX-V565BL has a $480 list price.
The RX-V665BL adds several feature perks, including second-zone audio functionality and XM and Sirius jacks.
Yamaha RX-V665BL back panel
The back panel also reveals that the RX-V665BL has 7.1 analog multichannel inputs, and 7.1 preouts. The RX-V665BL has a $550 list price.
The RX-V765BL doesn't have add much in terms of features, but it does have a discrete amp configuration that could produce superior sound quality. We'll have to wait until we get it in for testing to find out.
Yamaha RX-V765BL back panel
The back panel is nearly identical to the step-down RX-V665BL's. The RX-V765BL has a $650 list price.