I have used the Devore Super 8 in two different places -
1) In the first place the bass on Devores was flat down to 35Hz. With a slight emphasis in the 50-100Hz region the bass was great and dynamic in that room (13 x 18 ft with 9ft ceiling).
2) The second place has a large glass wall and low bass leaks below 70Hz. The Devore just like any other speaker sounds very thin in that room, unless you fill in the bass. With two JL Audio subs the sound is huge in that room.
I measured both rooms very carefully - Devores' bass is not overwhelming and flat in a good room, but could tend to the thinner side in a not so good room. Also note that user Stereo5 had the Gibbon 8 NOT the Super 8. The front port looses more bass whereas the rear firing bass will give you more boundary reinforcement.
I have not owned the two other speakers but have listened to both fairly often and on different systems (and owned a Spendor S3/5se). IMO neither comes close to the resolution of the Super 8. I combined the Super 8 with amplification way above 10K and the Devores rewarded every little improvement.
Also, the biggest advantage is that the Devore are quite a bit easier to drive than the Spendor or Totem and can work well with a tube amp in the 20-40W range. For a good small system I would pair them with a Nait 5, for much more resolution a First Watt F5 works very well too.
That said the Spendors may be more forgiving of lower end electronics and front end.
