I have had 42" SurroundBar for a few years now, and recently got a used Outlaw 1050 AVR to run it. This AVR includes a sixth, center rear surround channel which can run either with Dolby Surround EX from DVDs with that type of encoding, or it can derive a sixth channel from the two surround channels in standard 5.1 surround sound. An opportunity recently arose to try out the OWM5 and see if it is a suitable speaker for use as a sixth channel. I received a pair of these, wired them up in parallel and set them up behind and to either side of my main viewing position. I also tried using just one speaker directly behind me. My favorite DVD for testing surround sound is Master & Commander which has lots of good creaking ship noises as ambient sound in the surround channels as well as good sea battle sequence with lots of directional cannon fire sounds.
The SurroundBar 42 can, at best, develop a surround field of about 150°, with an occasional sound that appears to come from directly to the side. Adding the OWM5 pair produced a diffuse sounding rear ambient sound stage which really complemented the SB42. Using just the single OWM5 directly behind produced a distinct rear channel which sometimes is just right for very directional sounds like cannons, but is sometimes too much for ambient noises.
To get a good blend of the rear surround with the surround channels it is important to choose a speaker with a timbre that matches the surrounds. I wanted to do an A-B comparison of the drivers of the two speakers. My Outlaw 1050 doesn't have a B channel but my old Yamaha RX-V496 does. I hooked up the left and right SurroundBar fronts to the A channel, and the OWM5 to the B channel (no subwoofer). I tried a variety of music genres and it was very clear that these were two quite different speakers. The SurroundBar is so much brighter than the OWM5 that I did not feel that it is a good match. So I will keep looking for a used RM series center speaker.
I also gave these a try as office speakers, hooked up to my Mac by way of the same Yamaha AVR and a Griffin iMic for a computer interface. I placed the OWM5s on either side of my dual monitors, about 3 feet apart. Speakers this close to the listener often sound grainy but the OWM5s sounded quite clear, good enough to tell the difference between 320mbs mp3 files and Apple lossless format. Bass response was acceptable and, as noted earlier, they are not as bright as other speakers in their size category. I think this is a good thing in this close in situation. I can recommend the OWM5 for a small office rig and suggest that a subwoofer be added to improve the bass.
Finally, I tried these speakers in place of my Monitor 7a pair in my main 2 channel rig, powered with a Parasound HCA 1000A. Again, the bass response was nowhere hear as good as a full range speaker like the sevens, but at higher volumes they do put out a surprisingly good sound for small speakers, not too bright or harsh like you might expect.
I did not try any of the wall mount methods, but I did set them up both vertically and horizontally on tables. For horizontal set up there are two self adhesive feet and a 3" piece of padded tape that you can apply to the bottom of each speaker, a simple and inexpensive solution. For a vertical orientation there is a snap on stand. This must work well for the OWM3 but it felt a little light for the OWM5, like it would be easy to knock over.
So I can recommend the OWM5 for a small office rig or a starter budget 2 channel system. I would bet that 3 OWM5s and 2 OWM3s would make a good budget surround system. They just don't match well with the SurroundBar in a 6 channel system.