I think you would be disappointed with the AM8 or Bss units (old units). The latest Lectrosonic DM series is OK (I have no experience with them or their software). Bss I'm not sure of either. The ones I've used are Clearone/Gentner XAP800, AP800 (old but useful) , Converge Pro (don't like the new software) and the Polycom Vortex EF2280 (don't like the external power supply, software OK) or the older ASPI EF2280 (original). Biamp's latest is fine but hard to find and pricey. There are others but these are the major players. About 2 weeks ago I checked e-Bay and out of 6 viable units the price ranged from $37 to $48 including shipping. You can also buy them for ~$1800. You choice. A new fan costs $7 plus ship.