Thanks for the comment, Terry.
Thanks to the rest for the advice.
It looks like the ksw10 will take either line in or speaker in. I hope I can find one on ebay for <=$200.
I don't know whether to get a pair of quintets or a pair of sb1. There are plenty of both on ebay. I guess I will get whichever I can for <=$150/pr.
Thanks again, y'all