I think either the HK or Glock would serve you well. It just boils down to which one you like best. I would say the $550 plus figure you indicated for the Glock was a little high. I think you can find them for right at $500 retail if you look around. Just my $.02.
Thanks for all the replys. I made my choice and picked this up today after a week + wait for it to come in.
It just came down to renting each (or something very similar) and finding I shot much better with the HK, so that was my final decision maker. I do like all the safety features on the HK as well. There's a show coming up in a month so we'll see if anyone has any 23's for way cheap.
But, for now:
PSS - I ended up ordering it because I found a place that has them MUCH cheaper than the $800 price tag I saw first.
It seems to me that you made the right choice for the right reasons. You shoot it better. Good luck and have many hours of enjoyment. I'm sure that if you ever need it for serious social purposes that it won't fail you.
BTW Great picture, too.