I am hoping to try these two PA heads real soon.

I can get the new PMH880S for about $70 more than the PMX2000.

Is having 800 watts over 500 watts worth it?

Anything else to consider?
http://www.behringer.com/PMH2000/index.cfm?lang=ENG

http://www.behringer.com/PMH880S/index.cfm?lang=ENG

Scott Langholff