MartinLogan LX16 bookshelf speakers ... they are very nice speakers and are available on Amazon right now for:
NEW in dark cherry for $240 a single speaker
USED in drk cherry for $412 for a pair
New in piano black for $299 a single speaker
I have a pair as my surrounds, with another pair on their way to replace my DefTech SM45s in the exercise room.
The LX16s are the predecessor to MartinLogan's Motion15 bookshelf speakers, and are essentially the same.
My son has a pair of Motion 15s and an LX16 as a center channel.
For $720, the 3 LX16s in dark cherry would be a nice foundation for a 3.1 set up (or $652 for the used pair plus a new one )
The MartinLogan LX16 / Motion 15 bookshelf speakers not only sound great, but they are very nice in appearance as well.
The Motion 15s sell new on Amazon for $400 (piano black) and $424 (dark cherry) per speaker