Remember, the measure of a carry pistol isn't just how well it shoots; you have to CARRY it, too. Full-sized 1911s like the Kimber have been carried concealed for many years/decades (probably since about 1912 ), but that doesn't mean they are EASY to carry concealed. It's not just the gun's size, but the weight when fully loaded that cause some folks' problems. You also must remember to thumb the safety on and off when needed (especially after shooting but before holstering), and the gun must have the safety in the off-safe position to load or clear/unload. Not ideal.
The SIG is smaller AND lighter, and SIGs are also great guns, in general. Most folks agree that a DA/SA auto requires a bit more practice and dedication to shoot well at high speed, as you have to learn to manage the transition between the long heavy double-action (trigger-cocked) first shot and the shorter/lighter trigger action for the second, single-action, shot. No manual safety to worry about here, but after shooting you must remember to de-cock the hammer prior to holstering, or you could end up with an unexpected loud noise (and maybe a hole where you didn't want one).
The XDs are fine guns as well, and although rather large, they should still be a bit lighter than a 1911 (I think? It's possible the larger amount of ammo would offset). The trigger pull is the same from shot-to-shot, and their reliability is good-to-great.
It pains me to hear that the Glock 36 is the one you shot to represent all Glocks. It is (and I say this as a huge fan of Glocks) the dog of the lineup. The small, boxy grip was made as small as possible to help concealment, but almost no one likes the way it feels/sits in the hand, even folks who otherwise like the gun's general characteristics. It is notoriously ammo-sensitive, and some G36s have demonstrated random stoppages that are hard to track-down and correct. The G30 is a better choice for defensive use in a Glock .45 in my opinion, but it IS quite a bit larger, and that presents another set of problems for concealment. Personally, I'd choose any of the smaller (sub-compact or compact) Glocks in 9mm, .357, or .40 caliber before I'd go to a .45 or 10mm, as the larger grip size can prevent easy shooting OR concealment for many people.
That's my 2 cents, might not be worth that much to some folks...