i have no experience with either the kel tec or the taurus mil. pro so i can't say either way about those.
As for the glock, i think its a great gun. Its got a great big product line that offers a large variety of calibers and sizes to suit different needs. THe company has been offering polymers for a long time and is generally well respected for its quality. Specifically stacked up against the XD, many glock fans argue that the glock offers far superior durability in slide finish over the XD. I will for the sake of not creating a frenzy of comments not discuss that tangent at length. However, i think most people will agree that the finish of the glock slide is more resilient against wear.'
That having been said, i feel that a great deal of any such XD slide finish concerns can be laid to bed with good regular care of the gun. Plus the fact that Springfield provides a lifetime warranty and the well recognized great customer service are both things that will give you some peace of mind. Again this slide finish issue has brought up a great deal of concern about rust, which is why i opted for the stainless bi-tone model to make it a little more resistant against rust and wear. I have had not a single problem with my own gun's finish and love the bitone to death. Ok enough about the finish.
Why should you opt for hte XD over the glock? I think it offers a preferable sight design. I have shot the glocks and i do not like the glock standard sights much, and prefer the three dot that the SA XD offers. Further more, it offers the added benefit of the grip safety which the glock does not have and i know many 1911 fans appreciate. I also like the fact that it doesn't have as much of an accentuated grip angle. I feel the xd's grip angle is perfect for lining up the sights. With my own body and my xd, when i bring the gun up to eye level to point at target, teh sights are already nearly perfectly aligned. This makes targeting much easier i think. THe grip also does not have those ridges along the front of the grip that the Glocks offer which never fit my own hand.
Why should you opt for the xd over other guns?
It is indeed ergnomically very well designed to fit in smaller hands. The grip is natural and comfortable and small enough to accomodate shooters with small hands. Furthermore, similar to the glocks, the slide lock lever is positioned far enough back that it is easy to engage with the thumb of small handed shooters without rotating the strong hand around the grip. It comes with standard ambidextrous mag releases that are equally easy to reach and operate. It also has convenient informational features such as the loaded chamber indicator and the striker position indicator. For carry, this is a great gun as it has a relatively well rounded body that doesn't ahve much jutting out to snag clothing or the like. It offers great value for the price, plus lifetime warranty. Its overall a great product that is getting rave reviews from many critics and is more affordably priced than comparable glocks.
ok... now i'm finally done. i think... for now...