Fondle er I mean handle the G26 and see if you will need the mag extension to get the grip you want, if so I would pick the G19 as is is almost the same size then. I personally like the G26 more, but as they say that is just my .02.
If the 26 is what you really want, then go for it. But trust me, at some point you'll want to replace that 19 as well! I traded my Gen3 G21 some time ago for an HK. Wasn't long before I was itching to replace that missing 21!
Keeping it in the family... I LOVE my 27. You've got to make friends with it first though. These Germanic sorts are very cold and brusk at first but after a few hundred rounds you'll get along like a house on fire.