Nowadays $50 a pop for magazines isn't what I consider expensive, I probably paid $40 a pop for all the Sig & HK USP mags I've bought over the years.
I've bought & sold a half dozen Glocks over the years and still have a g32 & g44. Love the modularity, my g32 (.357 sig) also has .40 s&w and 9mm conversion barrels.
But never been a big fan of the ergonomics compared to more current designs like the M&P series, Caniks or the last gen Walthers. And Glock could easily offer a better trigger, yea there's inexpensive aftermarket fixes but nowadays Glock is at the bottom of the pile in regards to factory triggers. At their price point others have em beat.
I like a Glock right out of the box. Simple, reliable, rugged. Like my old HK USP, it's kinda clunky but I won't ever have any surprises if I don't go nuts with mods.
Personally if I were going to go crazy with mods, I'd start with a CZ.