Tony, just thinking - new pistol means new holster, right?
I'll save my pitch, but Raven Concealment Systems just upped production and some holsters (for example, OWB's that fit Glock 19's) now are shipped within 45 days.
I got in before RCS became popular and had a two week wait. A friend of mine ordered one back in September, and it took 16 weeks to get it made.
Yes, there's a reason. Best. Holster. Ever.
http://www.ravenconcealment.com
Also, if you go the 19 route, I recommend that you change the following:
1) Toss the cheese-grater trigger and replace the 19/23 trigger bar with the 17/22 trigger bar. Get that nice smooth trigger for less than $20 and 5 minutes of install time.
2) Pop out the OEM mag latch and install a Vickers/TD mag release (not for Gen4 guns).
3) Remove the slide stop and replace it with a Vickers/TD slide release.
4) Toss the OEM plastic sights and try the Redback One sights from 10-8.
HTH.