I'm looking into buying one to film my documentary film. The big question is if I will need to buy the additional XLR adapter AG-MYA30G or not. There is a mini mic plug. If I buy a higher end shotgun mic that uses the mini plug, will this be good enough? The shotgun mics have a battery so no need for phantom power. I also I want to use a wired lavalier mic which also has a batttery. Will the sound quality be as good or do I really need to get the XLR adapter?