Well, fresh off firing the 19X today, I can safely say that it is the best Glock I've ever fired. It's difficult to quantify how well it feels in the hand. The marksmen barrel is a definitive upgrade, as right away I was putting rounds in the black and many right near the bullseye on my first magazine (We were shooting Remington 115g FMJ). More accurate than my 19, easily. I'm not sure I could conceal it as well, and it would definitely require a new rig, but the gun just feels superbly balanced and super soft recoiling. I know it's a 9mm so one wouldn't expect much recoil anyway, but the muzzle flip on this is nearly nonexistent. The trigger, for a Glock, was surprisingly good. I didn't even think about it. This one had night sights, and they were easy to acquire.
I did not think I'd like this configuration better than the 19, but after 100 rounds or so, I'd trade mine right now for one.
I'm not sure I care for the color but that could be addressed easily in due time. In my humble opinion, It's better than both the 17 and the 19 to me, both of which I've had a lot of time on.
if you are looking at buying a Glock, and are interested in 9mm, I'd try this one first. I came away extremely impressed, and with night sights and 2 19 round mags, it's a unique and really fun handgun in Glock's lineup.