I just had to figure this one out as well, I've been searching for that gun thats going to grow old with me and be my long time friend that I trust implicitly, I started with a Kimber Eclipse, .45, really love it, and I dont have a problem carrying a heavier gun, but Only 8 rounds. I knew the .40 has a higher capacity so I bought the S&W .40 M&P, love this gun as well! So, which do I carry? Both of them! I just switch out the weeks I carry them! I practice with both, and use the same style holster for both! As far as I'm concerned they are about equal! I do shoot a little better as far as bullseye's with the Kimber, but the M&P still gives me about a 2" grouping so I am confident with both, The Kimber needs a safety to be released to used, so I can see myself carrying the .40 a little more for draw speed alone, but love and use them both! I dont know if this helps any, but thats my 2 cents worth!

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Omiedudeman