Go gen 3. Let the gen 4 get all its problems out the way if any. It's kinda like the new cell phone everyone wants. They get it when it first comes out then upset when somethin goes wrong cause its new. I would let Glock perfect it first from customer feedback. (this is only what I would do) to each their own.
Thanks for the feedback guys my main concern was guide rod spring assembly gen3s are puny against the gen4s. And since i will be gettin my g22 next week i wanted to see if shellin out the extra 50 or so for the gen4 was worth it!
I have 2 gen4's (26&27). I had a gen3 26. I have smaller hands...prefer gen4. Like the more aggressive grip. I would recommend going to a range u can try both... See what feels better. That way u won't have buyers remorse...that being said u can't go wrong w either.