I think I'm going to get the C-Comp porting on one of my glocks just for the heck of it. I already have them set up the way I like, so I don't want to buy a NEW ported glock (though PSA has G17Cs for $459 at the moment w/ free shipping--thanks Plouffedaddy/gunsngear).
Anyway. IF you were going to port either a g19 or a g17, which would you do and why?
I'm leaning towards the 17 since (a) I carry it less, and (b) the velocity loss won't matter as much as with a 19. I also may cut this G17's grip down to 19 size (because I have more 19 mags and don't want to ever accidentally grab the G17 and an extra G19 mag--and also, I think it'll reduce the size of the hump more than the OEM 19s hump). If so, I'd be carrying it more.
I don't buy into all the fear about blast and noise and bright flashes killing night-vision and blocking the view, etc. Good, low-flash ammo is abundant--and most reviewers I trust say all the fears are overblown.