When choosing a gun what do I look for in terms of fit?
Just holding the pistol, it should feel comfortable/natural in your hand. When you raise the pistol, (as if you were going to shoot it) you should not have to make any large angular adjustments with your hand(s) to bring the sights on target. You should be able to reach all the "controls" without re-arranging the pistol in your hand(s).
If the pistol is not comfortable for you to hold, you won't shoot it enough to become proficient with it.
Just my 2 cents worth.... keep the change