i know this isn't a question most people like to ask, but i'm on a very limited budget. i play at a small church (100 people max) in a room half as big as a basketball court. we've got a not so hot PA system, and only 1 or 2 acoustics, possible keys, and sometimes an electric for color. i've been playing my bass thru the PA, but that's not doing so hot. how big of an amp would i need?