95% of the bows you get for $400+ in the classifieds here are very good.
Right now there is a Treadway, a Schafer Silvertip, a Mohawk, a Kota, a Morrison, a Pronghorn, a Dale Dye, an A&H ACS, a Robertson, a Tomahawk and 2 Centaurs for sale in the classifieds, all between 50 and 60 lbs @ 28", all spoken highly of in several posts on Tradgang!
And that was just browsing the first page! I am certain there are some Black Widows close by as well
But, from what I hear and read, Black Widow are very solid and reliable bows, with formidable power built in!
Good Luck, and post some pics when you get a bow :p