instead of spending that kind of dough on your g22, try this combo that worked for me and cost me a total of 25 dollars inc tax and shipping. GLOCK competition trigger spring, 4 lb striker spring, wolf 3.5 lb trigger connector. The trigger will be lighter, have a shorter reset, will be crisper and have less takeup and slack. i swear by it, my glock 22 and 23 both wear the same setup and i became a better shooter instantly. Its not necessary to spend that much money on a 500 dollar gun. thats like getting a 1600 dollar rail system on a 400 dollar norc m14. if you want a killer trigger, get a decent 911 platform. i had shot glock/springfield/smith and wesson based striker fired guns and they all have crappy triggers....subsequently they are not meant to be tac drivers...they are simply combat guns meant for center of mass reliable shooting
you can continue on and obtain a stainless guide rod and a variety of recoil springs. A match grade barrel is not a must, but makes a huge difference. I found my stock glock 19 with only a wolf match barrell to be super accurate, infact, shot way better than my glock 34. sights are also a good investment, front fibreoptic sights work quite good with even stock glock rears...the world of glock parts is amazing, lots of them and relatively cheap....