#1: WELCOME to the forum, you'll enjoy your time here!
#2: I've carried a 226 on duty for about 17 years now, and never been dissapointed. First was in 9mm, now in 40 S&W.
I love the Sig pistols. You'll be pleased, I think. Go to a match if you can, and meet realy great people. Ask questions about the most popular guns they shoot, and ask advice. Might even get to shoot one or two! Better to try before you buy.
#3: Again, Welcome!