Like everything in the a/v world, people have varied views on the specific products to purchase. Do alot of research before you buy.
My church is currently doing a one camera shoot with a feed from the soundboard. We are getting ready to move to muliple cameras, and I am doing alot of research trying to figure out the best way. Unfortunately there isn't alot of info out there that I have found so far.
Anyway... for your situation. Think 5 yrs from now. Your church is 3 times the size, still in the same building, and your Pastor decides he wants to broadcast the services live on the internet. Will what you buy today interface into what is needed to do that?
There are some DVD recorders out there which work really nice. You can then use a DVD duplicator and have up to 10 copies of the DVD with nice customized labels within 20-30 minutes of the end of the sermon. We use this set up and an Epson printer which prints directly to the DVD's so the final product looks very nice and is customized to the sermon title for the day.
I would look at a better camera than the GL2. We are looking hard at the XL2. The biggest factor in that decision is where is HD, and do we need it yet? We decided it is in it's infancy, and we can upgrade once the standard is truly developed. No reason (for us anyway in our specific situation) to buy an HD system (remember the betamax v VCR wars??) at this time.
Good luck, and hope I helped
Tom