If I were in your shoes, I would seriously consider the Orion ED-80, it's it a bit bigger than some of the others but for the money, it has the best optics and a decent focuser. There are quite a few nicer looking "achromat/semi-APO" 80mm F6 scopes at the $400 price point but in my experience/opinion, the extra size and money is well worth it to get the color free optics.
jon
jon