I just pulled the trigger on the WA7 and some hd800. Although I completely trust the head-fi community I am extremely nervous!! It's a lot of money! I have been listening to he500's through a E7/E9 combo and it sounds ok but I know that I have never heard the true glory of these awesome headphones. In all theses post I have heard a lot of folks say the hd800 and the WA7 is a really good synergy and also good things about the he500 and the WA7. I'am hoping that I will be able to get complementing sound signature from this setup. I euphoric mid-range for my rock and electronic music and when I am listening to more complicated music I hope with the hd800 that I can really get inside the music and feel the emotion that the song is trying to convey. I really wanted to say thanks for all of the people to in this awesome community where I live in Alabama there really is no audiophile meetups so I love getting on here and hearing everyone opinions. When I get the WA7 I am promptly going to put up a review of the WA7 and the he500's because I know these headphone and they are really broken in. Wish me luck! Thanks a lot head-fi!
Yup, that's a lot of money to spend if you don't really know how this combo will suit you. But I can't imagine that you wouldn't see a marked improvement over your current setup. From my experience to get the HD800 to sound even better would mean spending another $2-3k, and the improvements are rather subtle.
What I noticed though is that the stock tubes in WA7 are not ideal for the HD800, so I'd recommend to get at least the EH gold pins from Woo or look for any of the cryo-treated varieties if you can find them.