I've finally made up my mind on what my first hand gun is going to be! I found what I think is a decent deal on a new G19 gen3 with NS at a local dealer. My question is do I jump on the deal for the gen3 or pay a little more for the gen4? I've fondled both on seperate occasions but never side by side and can't really remember a difference between the two. I guess I just kinda feel funny buying something when a newer version is available. Is there any big differences, pros, or cons over the two? Any help is greatly appreciated, thanks.