I HIGHLY recommend this one:
Lightweight, small, 144 hrs(ep) / 11 hrs on XHQ(extra high quality)
AND it connects direct to your PC w/supplied USB cable and has good software for pulling and editing/storing the files.
Unfortunately in PA we are a two party consent state and the LEO are of the opinion that they can record you but not the opposite So it is of little use for me while open carrying. But these things have a million uses. Once you have one you'll use it for things you never thought of