This is all I can find...
Why should I get the 705 over the 805?
-More affordable
-Much small compact body size and weight:
705 = Dimensions (W x H x D) 17 1/8" x 6 7/8" x 14 13/16" | Weight 28.4 lbs. (12.9 kg)
805 = Dimensions (W x H x D) 17 1/8" x 7 5/8" x 18 1/16" | Weight 50.9 lbs. (23.1 kg)
-More power efficient (6.2 amps vs 9.5 amps) Normal household circuit breaker is 20 amps. Combined with TV, sub, players, game consoles, lights, etc. Its not a major deterrent as you can relocate devices around the room onto other circuit breaker outlets but its important to stay aware of the power loud. 9.5 amp is also at max volume only.. expect that to be around 80% of that number at normal volume levels.
-Cooler running and doesn't pose a fire risk. (Search official 805 thread for evidence of this; several users have said their 805's burnt out and caught fire after a few weeks of use. Its not common but the risk exists. These users also had plenty of space around their receiver so it wasn't that those users didn't allow for breathing room. For me, risk of fire was the number one deterrent.)
-The video section of the 805 is basically the same as the 705. You need to step up to the 875/905 to get improvements in video.
Why should I get the 705 over the 805?
-More affordable
-Much small compact body size and weight:
705 = Dimensions (W x H x D) 17 1/8" x 6 7/8" x 14 13/16" | Weight 28.4 lbs. (12.9 kg)
805 = Dimensions (W x H x D) 17 1/8" x 7 5/8" x 18 1/16" | Weight 50.9 lbs. (23.1 kg)
-More power efficient (6.2 amps vs 9.5 amps) Normal household circuit breaker is 20 amps. Combined with TV, sub, players, game consoles, lights, etc. Its not a major deterrent as you can relocate devices around the room onto other circuit breaker outlets but its important to stay aware of the power loud. 9.5 amp is also at max volume only.. expect that to be around 80% of that number at normal volume levels.
-Cooler running and doesn't pose a fire risk. (Search official 805 thread for evidence of this; several users have said their 805's burnt out and caught fire after a few weeks of use. Its not common but the risk exists. These users also had plenty of space around their receiver so it wasn't that those users didn't allow for breathing room. For me, risk of fire was the number one deterrent.)
-The video section of the 805 is basically the same as the 705. You need to step up to the 875/905 to get improvements in video.