Well, I just bought a Denon 3805, not the Yamaha, BUT my buddy has the 1400 and we played with his set for a lil while before, In my opinion (keyword .. mine, remember a lot of these things are subjective) the YPAO did an outstanding job of setting up his sound and level parameters.

So, have I changed my opinion, No, I may just get a Yammy from the local Tweeter and try it to see how it sounds with my speakers and check out the YPAO.