Seth- How's it going! I have heard the 805's but not the M20's, I have friend who is a big monitor guy and he preffered the Dynaudio Contour 1.3 over both of your choices and recently upgraded to the Jean Marie Reynaud(sp?) trenta and is in audio heaven. I liked the 805's when I heard them but I am not a monitor guy so they weren't for me. I believe there has been a few threads on this not too long ago, try a search you'll get a lot of input that way.
Cheers and keep us posted as to what you end up doing.
Cheers and keep us posted as to what you end up doing.