When you DO get a G29 you are going to like it
I have a G20 and G29, the G20 was my first glock. I found a case of Norma 170gr and 200gr a decade back, and that's my carry ammo. I handload otherwise.
When I first got the G29 I was ready to be brutalized by the recoil in the smaller gun. I was more than surprised that the felt recoil in the 29 was LESS than the G20.
As it turns out the slide itself is beefier, heavier. The recoil assembly is a double spring setup, lighter primary spring and heavier secondary. But I think the heavy slide is the culprit for the lighter recoil.
I've had and sold a lot of pistols since I got the G20 in 1996, and that gun is the only one I still have. I have a jarvis match barrel in it and a six inch hunting barrel i rarely use. I found 8k of nickle plated brass from somewhere back when the FBI was using the 10mm, and handload that for practice.
You're going to wonder why you didn't buy the G29 first.