What is your music team set up right now?
Does your electric guitarist have his own amp that is powerful enough without being mic'd up? Does your bassist have his own amp? Are you needing a mixer to run out some monitors? I'm assuming that monitors aren't a necessity at this point?
What I've found works extremely well for small venues and even bigger ones, around 150-200 people... Is to have a mixer and powered speakers. The reason I'm in favor of this is that there is less that can go wrong at this point. AS WELL AS, you probably have to set up every Sunday and tear down every sunday too.. A lot easy to run a cable between two speakers, one speaker to mixer and you're set to go.
My advice is to look into some Wharfdales.
http://www.wharfedalepro.com/Home/Products/POWEREDLOUDSPEAKERS/SVPPSERIES/tabid/169/Default.aspx
I'm a big fan of those. Quality stuff, and they sound great!
http://www.maxmusic.co.za/ProductInfo.aspx?productid=SVP15P
Looks like they're around R3500.. Which is quite high. However, if you can pick up a good little mixer for R3-4k, you're sorted with some good sound.
At the church I'm in right now, we're running two wharfedales, with a mackie mixer. The sound it is really good!