I just picked up a Glock 19/23 frame and am looking to complete it with a 9mm slide and barrel. I was thinking of finishing it with aftermarket parts. This gun would be more or less a range gun with iron sights, no red dot. What aftermarket slide and barrels should I stay away from? What has worked for you? It's a Gen3 frame, if that matters. Thoughts...? Thanks for the help deciding.