imported post
When it comes to the very piece of hardware that will possibly stand between life and death for you, what it costs is not the first thing on my list. I'll agree that when you're on a very tight budget, "A gun" is better than "NO gun," but if you can afford it, why short-change yourself? My life is worth more than the "lowest bidder."
I have carried the P245, which is essentially the older version of the P220 Compact, but without the beavertail. Extremely accurate and easy to carry/conceal weapon, especially IWB (I used a Kramer #1-1/2). You will find that the single-stack .45's will be much more comfortable to carry on a regular basis than the double-stack ones (like the Taurus). Another couple of single stack .45s you may wish toadd to your list are the Kahr P45 and GLOCK 36. These are single stack polymer-framed guns and are very light and thin (you will carry it more if it's not a burden on your belt).
From your two options, however, I'd say go SIG.