To the OP:
I just got into airsoft last season and I bought a CA SCAR and to this day I regret not being told to buy a KWA M4. I've since sold my SCAR and couldn't be happier with my M4. The take down of a M4 and its' gearbox, even if you need to watch a video for help, is about the easiest thing once you've done it a few times and if anything should break, there are a million replacement parts on hand. I would personally avoid a G36 because they have annoying issues with selector plates and you can't run simple M4 mags in it without an adapter. G36/SCAR midcaps are much more expensive than M4 mags, another thing you might want to consider. But I highly recommend you get a KWA M4.