I can heartily recommend the yamaha m4 in that price range. This (semi) vintage amp sounds better than it has a right to in this price category. It looks like run of the mill, black box garbage, but sounds anything but, so don't be deceived by this book's cover.
http://www.thevintageknob.org/yamaha-M-4.html
http://www.thevintageknob.org/yamaha-M-4.html