Hi, Saw your harp-l question. I would use that amp you have and use the pa mic for your clean sound. Just get the amp on a stool or angled up at you someway to just get it closer to your ear. I used to used my champ (1- 8" speaker) like this with a full band.
Better than spending $500.+ for a new amp !
Good Luck
Garry, & the Moodswingers www.moodswingers.net bluesn~x.netcom.com 203.458.1293