The XDm, is an excellent pistol. A little big for carry, I think personally. If that's the direction you are going, you may want to wait. Until the XDm with the 3.8" barrel is released in a .40. I also give top marks to the M&P.
I've been carrying the XDm 40 for a year now. It's a great shooter and I don't have a hard time concealing it in my Crossbreed holster. The Xdm 3.8 is already out, but I'm waiting for Springfield to make a compact frame now that they have the shortened slide (wishful thinking).
I've shot an XDm 9 and it is a fine gun. Probably the best feeling plastic (oops, polymer) pistol I've personally held/fired. Good trigger, although it for some reason felt kind of wobbly, good sights, great capacity. I don't know how to further explain the wobbly comment, the trigger itself had some give in it - not in the pull of the trigger but it almost felt kind of flimsy. I'd imagine the .40 handles just like the 9 but has a dramatically different recoil impulse.
I think the 3.8 is supposed to be an alternative to the XD service. My thought process is that Springfield has the shorter slide, and is currently working on the compact frameI don't know...my guess is it's not that much wishful thinking. They are releasing a .45 XDm this year (FINALLY ) and I am sure have listened to the complaints over a full size frame/short slide gun. I don't understand why they would make a 3.8" barrel and keep a full size slide. What's the point? Not much more (if any) ability to conceal it and compared to the 4.5" bbl XDm, lesser velocity. I'm personally expecting them to come out with a compact framed XDm here soon.
I've shot an XDm 9 and it is a fine gun. Probably the best feeling plastic (oops, polymer) pistol I've personally held/fired. Good trigger, although it for some reason felt kind of wobbly, good sights, great capacity. I don't know how to further explain the wobbly comment, the trigger itself had some give in it - not in the pull of the trigger but it almost felt kind of flimsy. I'd imagine the .40 handles just like the 9 but has a dramatically different recoil impulse.
I shot Pop Gun's XD 9mm compact and loved it. Have you fired the compact, and, if so, how does your xdm compare? I love the feel of the full size XDMs. Also, can you compare it to the M&P 9mms? Ever fired one?