One company I took notice of was Inokatsu, they make super high quality Airsoft guns. I was drawn to their Sig Sauer P229 and 1911 pistols that by the way are made out of real steel and as close to the real version as possible without it being a real gun. The Inokatsu pistols I looked at are not cheap and will set you back over a grand but are as close as you can get to a real sidearm as possible in an Airsoft version. They feel amazing to shoot with heavy blowback and that sound real steel makes when the slide snaps back.
Let me know if you're like me and would be willing to part with a substantial amount of money for one of these treasures?