I would not get Bose.
This is probably going to be fixed instalation.
First I would get a digital mixer. Presonus StudioLive 24.4, or new Behringer x32.For speakers there is a lot of choice.
Try Jbl prx600 series.I just got prx635 3way and they are great.1500w powered.Those I would put for FOH.
The rest I would go with Jbl Prx612.Maybe 4 of those to install in the hall.Plus maybe two more for monitors.
Or for monitors you can get couple of Mackies too.
Also check these new Mackies that are coming out DLM.

Don't buy anything before you try all of them.10 000$ is a lot of money.
Make sure you get good mixer.And for the money digital is the way to go.
I would get x32.It is Behringer,but Midas made it.It has everything you need for processing.
Again don't buy anything before you try it first.Maybe at your church.
Mikimiki