People say 'use the gun that fits your hand'
the problem with this advise is hands are generally roughly the same size and while all handgun grips are a bit different, they are all generally the same (expecially within a class, such as double action wonder nines)
the truth is, to a novice, ANY gun will feel pretty good in the hand, especially if the novice isn't aware that he should be holding high on the axis of the gun, and that the gun barrel should be parallel with the arm. I've seen a lot of people pick up a wide griped gun and unconsiously NOT have the barrel parrallel to the arm without even realizing it, they just automatically have it twisted about 10 degrees of center because that allows their hand to more fully close.
You take them, straighten the gun out (which often spreads the fingers) and then they say it feels funny.
Please, Wolfman, before you fully decide on the short and wide glocks, specifically request to hold a Kimber 1911, Sig 220, (Sig 239 too, but this will be harder to find in stock) and the Kahr K9. This will give you a good baseline of what 'single stack' slim grip firearms feel like...then go back to hold the glock, paying special attention to holding it up as high as you can on the grip, and special attention that your forearm, wrist, and barrel all line up (if viewed from the top)
The website Cornered Cat, while aimed at women, has a great section on handgun fit. Please look at the picture labeled "a perfect fit" and "too-large gun". Let me clarify that in the 'too-large gun' picture, it is really more accurate to call it 'grip is too wide and/or long'
http://www.corneredcat.com/FirstGun/tryongun.aspx