I carry my xdm 9mm 3.8 daily and I like it just the way it came. I've thought about sights and a trigger job but I just spent that money on another gun instead.
My first CCW was an XD .45 service with XS sights. The pistol itself ran like a champ, my only real concern was that my magazines kept developing bulges in them which prevented them from dropping free when empty.
I traded it in, but would not mind picking one up again someday.
Just picked up a XDM 5.25 40 today! Cant wait to get some rounds through it his weekend. I couldn't think of a better 40th birthday present for myself than a new 40cal gun!
I own two XDm's. Both 3.8's, one in 45 compact, one in 40. Price on the 40 was too good to pass up, despite the shorter barrel. I love the feel of both, and plan on getting some Trij HD's in orange to go on the .45/ The 40 came with Trijicons.
I carry an XDM 3.8 Compact in 9mm in a Raven holster with a 19 round full size mag with me all the time. Also swapped out the sights for night sights as soon as I got the gun the first time. Been loving this gun ever since. Been thinking about getting the XDs 9mm