But after hearing all the woes of the new MKIIIs on here
Don't let me or anyone else disuade you from a MKIII. Many (most?) have great success with them out of the box with no mods. Do I prefer the MKII? Yes, but the MKIII is usually just fine, and if not can be easily modifed by removing the LCI and mag disconnect to essentially become a MKII with what many believe is a better magazine release.
The MKIII is nice because while very accurate out of the box it can easily be made more accurate and grow with the shooter with simple installation of a few VQ parts. If you just want a plinker, the NEOS seems fine though.