Here is a link to a recent discussion about the merits of the VSX-82 vs. the 2807. The 2807 & the 3806 are similar, though there are some differences. 3806 is beefier, 2807 has HDMI, few other things. This might help some.
Really though, both are good receivers.
forums.audioholics.com/forums/showthread.php?t=25530
Enjoy,
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