I know the PMH2000 has been popular among some of the SZ members. I have seen and used one. It is a good unit.
http://www.zzounds.com/item--BEHPMX2000

The PMH880S is a newer one by Behringer with more power and only weighs 19 pounds.
http://www.zzounds.com/item--BEHPMX880S

Scott
http://ScottLMusic.com