Gnfanatic:
You're getting some good advice here - listen to these fellas
The range thing is something I highly recommend, but I'd like to add something.
PLEASE don't worry about buying the perfect pistol your first time!
Nobody has ever bought the perfect pistol their first time out... Well, except maybe my buddy gudel with his H&K, but that's pretty rare! I'd say the same thing about a Sig P220, if you like .45's, then work your way up to one.. After you shoot a Sig P220, nothing else will do!
Of course, these are our opinions, and yours might be totally different.
You're looking at great guns, and either one your buy should serve you well... If you have fired .45ACP, and .357 magnum, then you have nothing to fear - you've already shot the most powerful guns you're likely to shoot for a while. If the recoil and noise from a .357 magnum doesn't bother you, then I highly doubt you'll end up making a purchase you'll regret.
My advice, DON'T BE CHEAP!
That's where you end up buying guns you will regret most times. My first 1911 was a GI model, and now I realize I should have just saved more money and got a nicer 1911... Do I hate my 1911? No way! I just wish I had spent more to get a model with more features. No biggie - just means I'll have 2 when I get my mind made up on the next one.
The price range of 1911's you're looking at is a great price range to start out with. You'll get the nice features that make a 1911 a pleasure to shoot, and something you can be proud of when you look at it. As for the 1911 you're looking at, I like it! What kind of accessories were you looking for?
We've all bought guns we weren't crazy about. Some folks, like me, are happy for a while and then need a change. I used to like the small calibers. .25acp, .32 H&R magnum, .380acp, 9mm... Now I tend to like the bigger stuff, and have several .45ACP's, two .357's, a .40S&W, etc... still a 9mm hanging around here somewhere though.
Your taste in guns, the things you like and don't like, might change over time. That's fine - but don't worry about making the ultimate purchase. There's no such thing. If you know you like something, then get it. I can't think of a better way to score your first gun. You can score a pistol cleaning kit at Wal-Mart or any sports store near you for next to nothing in cost.
As for the revolvers - it took me a LONG time to like the idea of one. I was all about my super high-capacity auto's with all the trims and fixin's. There's nothing wrong with that - that's the good thing about guns! There are just SO many choices that nobody should ever have to buy something they don't like.
Recently I've developed some kind of lust for revolvers that won't go away, so that's what I've been buying recently. You couldn't have paid me to believe you if you told me a year ago I'd turn into a revolver freak. Perfect example of how your tastes can change over time. Good luck! Get what YOU like, and sleep well at night. Shooting courses will also be a great help, and the more comfortable you get with your guns, and the better you get at shooting them, the more you'll want to look into carrying concealed - all this stuff comes with time. Work at your own pace - this is a lifetime thing and there's no rush. Have fun, and BE SAFE! That's what's most important for now.