Hi everyone. I checked Craigslist and came across a Technics SB-W33 passive subwoofer on sale @ $50. I may take it, but I'd like your opinions...

For the bookshelves, since I take a sub I might go with some high-mid level speakers... Give me your ideas

. As for the receiver, I need 50-75 watt output with 4 channels and an RCA in, any age. Any suggestions ?
Thanks a lot for your help. It is very appreciated.
alexjdb