Here is the little Pioneer SW-8mk2 that I use in my nearfield desktop speaker rig. It blends seamlessly with the BS22's. 95% of the time it just sounds like the 2 speakers are doing all the work, only with really bass heavy music does the sub really stand out on it's own.
Here is my Velodyne DEQ-8R, I use it in nearfield next to my desk. For an 8" sub, this thing is surprisingly good, blows away my F-12 in terms of accuracy, and is more pleasant when turned up because it isn't a boomy mess. Got this "refurbished" from Velodyne, but hell if I can find any reason to not consider it new. Also has DSP, a calibration mic, a high-pass filter, and a remote. one of my favorite purchases in this hobby thus far.