You've already answered your own question.
Get the one you want! Go with your emotions since this is one of the great reasons why we "like what we like".
If you really like the G17, then get it. If you are only considering the G19 because of concealability but wouldn't otherwise, then get the G17.
Is this a true carry piece? How big are you, can you conceal the G17?
Don't be so overly practical unless you are only 5' tall and have really small hands.
If you get something other than what you really wanted, you might come to regret it and end up buying what you originally wanted anyway.
Sounds like you want the G17, so get it already!