Budget speaker $600 or under recommendations

I am looking for some "budget" speaker recommendations for a 2nd system. Looking to spend $600 max, new or used. This is going into a second system, where we will be listening to internet radio, FM and AM radio, CD's, and the TV. Floorstanders or monitors are both OK. Amp is a Music Hall Trio; 50wpc, not a whole lot of current, so the speaker should be relatively easy to drive. FWIW, I have Tyler Acoustics Decade D1's in my main system. I have also really liked the sound of Von Schweikert's in the past. Musical, fairly transparent, not to lean is the sound I would like to go for. As this is a 2nd system, I would just like to put something together that is pleasing and doesn't sound like mid-fi.