Well i'd say get either a GoPro or a ContourHD, you should be able to get them mounted anywhere on the gun, or mounted on your head for better viewpoints. Both have a good wide POV.
Money wise at the moment,Im kinda looking for the lower end of the market.I would have mentioned that but my keyboard was playing up and I lost the rag with it lol.
I personally use a gopro 3 silver and its brilliant for what I do! shoots good footage and all the mounts and accessories mean I can use it for any sport or activity I do..cycling, skiining, holidays ect
I got a lot of footage from the Replay on my youtube channel: http://www.youtube.com/user/speederfreak
But have in mind that the quality gets better with better lights - and the indoor light on our field is not that good. yellowish, dimm etc.