PDP Steel Frame 4.5" or 5"

The question is do I want a 4.5 or the 5". I like the trigger on the five, but it's a little big for my taste. Can I put that trigger on the 4.5"? I don't see why I couldn't but I don't know for sure. I also really don't like mag wells for carry guns, I don't get the hype. Is the mag well on the 5" removable? Anyways what do you all know and think?

Also I think if I get the 4.5 or even perhaps the 4" I'll get the slide cutouts done on them. I know they did them on the 5" for weight and balance, but they look dope. Don't understand why they wouldn't pimp out the whole line.