Lena we use ChurchStreaming.tv and have been very happy with them. They only support church customers so they taylor their support around service times. I've found their support and product development to be exceptional and timely. The pricing is an 'all you can eat' plan so you can stream as many events as you want each week for the same price. They tier the pricing by peak number of devices across all your events.
We use Vimeo for our simulated live/replay/archives and recently built our own front end system to our archives that consumes vimeo videos. CSTV is the database that makes the archive system work as well as manages our Roku & AppleTV apps.