ok

In order to recommend something, we should at least know what kind of projects you want to do.

It's not the same for interviews or corporative videos, than short movies. Also not the same for videoclips, as no sound is usually needed (unless it's a short movie kind of videoclip) ^^ . It also depends on your own: if you're a guy with knowledge, you start taking things other level in pricing and quality. So in order to have sound on a short movie you can record with a simple Rode NTG-2, and try to make your best, or hire a sound guy, with a proper recorder and rent micS.

I personally try to follow this approach:

Short movies: If intentions are to lose money, but send it to festivals, hire and renting. Yet you lose money, but not as much as if you needed to buy the stuff (as good sound in short movies can get complex). If its web intended, no projection, just make friends. That's what I do personally, it's hiring for free, as I'm not earning money and neither does my sound guy. BUT, I'm from Spain, here things are tough so a lot of people just like working for free in this sector, just as I do.

Interviews, weddings, non-fiction stuff: usually this is much less pain for sound recording. Though it would be best to have a sound guy, it implies costs getting higher, so my experience is that getting a mic and a recorder might in long term be better. But that's market talking, as here low-profile sound is pretty much accepted as long as costs are as low as possible.

So...are you just trying to get some environmental sound? Is it for people? How many people? Fiction or not? Is winning money something you care, or is it a blind investment?

I personally would recommend to really understand your needs, and what sound stuff can and cannot do prior to making any purchase. Here at personal view, under sound category, there's a lot of understandable stuff.

I can't really tell you how much of an improvement there might be, but it's there and it's noticeable. Built in mics are shitty, gotta accept that. No battery draining as if you want to use GH3's line in you NEED a self powered mic (which Rode NTG-2 is).

There's some limitations recording internally, but it would be an obvious improvement over stock. Anyway, I can get a feeling that you are overthinking a lot, a tool is just a tool, you gotta learn how to use them. As said before, I'd recommend much more reading and learning on sound.

Oh, and please, new keyboard, hands or English lessons. Or less pot (just kidding, though some people really do talk like that when they're high). No personal offense intended but it's freaking hard to understand you...

Sorry about the poor English its just that I have gotten into bad habits with phone texting etc.

Probably the only time I type anything now

Regards