I also play for church. We play contemporary praise and worship songs (Hillsongs, etc)

I have done a lot of research and the best sound for the price without sacrificing sound quality is the BEHRINGER ULTRATONE series. They have several models. You can get 2 of them for true stereo sounds. Even one of them actually is pretty good. It's got everything you can think of. It's got enough inputs for many players, effects, so no need for separate mixers for a small group. Even Guitar Center carries them and they have money back guarantee if you decide not too like them. The reviews are also great.
Pls note only the K1800FX and the K3000FX have the stereo link capability.

Here are two links with reviews:
http://www.musiciansfriend.com/product/B...-Amp?sku=480782
http://www.guitarcenter.com/Behringer-UL...268-i1169233.gc