Like Joe says, BIG SCREENS EAT BATTERIES. If you get a camera with a big screen, it will go though batteries very fast. If you get one where you can turn the screen off it will help hugely.

Other than that, go in store, and try them out. Best way to find how annoying power up, shutter lag, etc are to you.

If you want to record sessions, maybe a dedicated sound recording thing would be best. Not often that a device trying to do lots of things is as good at any of them as a specialised one.