The Studio 2 line was the last of the S series and was known for great sound in a smaller footprint.
The S36II excels as a surround or wide fill speaker, though it's actually enough speaker for a front in a smaller system. It's original S series cousins were huge and deep. The SII is quite thin, less than 6" deep, fitting nicely into thin bookshelves (IKEA Billy) of on the wall. And there are also handy wall mounts built into the speaker case, so you don't have to butcher it.

While the S36II, with its 6" low frequency drivers, is not a huge bass player, it will go down to 80Hz without protest and has a very clean, very even sound in the mids and highs. The speakers are designed to be used in mirrored pairs for optimal imaging.

Also available in a weather proof outside version, probably the best sound you can have on a deck or pool.

Craigslist or Ebay is the place. You can probably pick up a pair for $100 and be very very pleased.