The G22 is a great gun for 40SW fans. It is large, by today's CCW standards, but 15+1 of 40SW is serious fighting business. As a Glock owner, you already know their merits.
I carried a 22, 23, and 27 for a number of years. The G23 was one of my all time favorite CCW's. I have a G19 and G26 in my current carry rotation.
Enjoy the license when it arrives. A good friend of mine lives in Illinois and recently completed his required class. He's a combat vet and looking forward to carrying. We've been friends since 1992 so he's been having me rub "I can carry a gun and you can't" in his face for 22 years. I guess I'll have to start picking on his choice in Scotch now.