First off, if thats your price range, get the G19 (assuming you are looking at the KWA). Full auto gas guns like the g18 are fun at first but then they dissapoint you in accuracy as well as emptying your magazine in less than 2 seconds unless you pay 50 bucks for the high capacity magazine. The G19 is around 100 and it is also more compact while offering the same power, range and accuracy as the G18. Its also not super tiny like the G26. Now as for the M9, I was actually looking as this gun myself. KJW is a decent brand, but look at the KWA metal M9 "New Structure". It has an updated spring and blowback system which gives it better performance than the original kwa m9, and certainly more than the KJW. Between the two gun models, it comes down to style because both guns perform in the same vein. I like glocks, so I have the G19, but I am thinking about getting the M9 NS for myself for xmas. Either way, just know that KWA has pretty much the best track record among gas guns (maybe tied with WE) so lean towards them for an M9 if you decide so.