Sub woofer that excels at the mid bass wanted

IMHO, this is the range where subs do their best work, smoothing the room induced impact on FR. As you go really deep in pitch (say <35hz), a good sub will be outperform almost any integrated woofer, but (again, IMHO) this has less impact on the end result - due to the lack of info in this range on most source material. A sub may provide audible improvement way down there, but the "clean up" over 50hz can be truly dramatic.

I use 12" Rythmiks. Remember that a kick drum fundamental is usually >50hz. You shouldn't worry about small drivers at 100hz. The key is carefully matching level, slope, phase, etc at the x-over point. A good sub controller (Velodyne SMS-1, etc.) will make this vastly easier.

Good Luck,

Marty

Rel T2 or T3 subs, or the awesome Definitive Technology Supercube III (unbelievable bass from a tiny cube, very quick).

You might consider the Art of Sound Raptor subwoofer. I am running with the crossover at 100Hz with great success.

Thanks for all the suggestions, I will look into them all.