I've also handled the EMPs... shot a number of them also. Take a look at a Micro Compact. Same size, 45acp. I have a review on mine somewhere on the forum... just search it. Here's a picture to whet the appetite.
"Loaded" model, 3" barrel. You do your part, it will do its part.
For size comparison: The second firearm is a Colt Mustang Plus II in 380 cal.
Hope this helps... (actually, it may just confuse your choices even further! lol). I don't like 40 cal in this size frame, hurts my hand to shoot for more than a couple mags. The 45 just seems to push right out of the barrel if you know what I mean....
Just my thoughts. Good luck
Da