I have a Glock 19 G4, use it primarily for CC and love the gun for many reasons. I want a second handgun for bedside (home defense) and to have something else fun to shoot at range. I am looking at the XDM 4.5 9mm - I like the feel, longer sight and value. Since they are very similar in shooting functions - no extra buttons to click or switchs, rack point and click... do you see any reason to NOT use the XDM ? I know their are differences. I have read that it is best to stay with the same "platform"... These 2 guns seem to be close enough for my use...I think! Input is appreciated.