Thanks for the responses. I currently have a few old boxes, Toshiba RT-S932 that I purchased new in the 80's, and a Magnavox 8443 I just picked up for 3$. I like the sounds of each, but would like to see how much better I can go while keeping in the ghettoblaster category.
The JVC M90 on ebay is tempting since it is from an original owner and with orginal manuals, but that is a lot of money to spend and I'm not sure if the sound quality is that much better compared to what I have:
Item number: 120572296629