What's the saying? Get a nice American made 1911, throw it on the ground for distraction as you shoot the perp with your Austrian Glock?
I'd get a 17 or 19 depending on what you like the feel of. I also like the XD series, the new XDM is awesome. HK is very cool but I only have first hand experience with the P series.
Just don't go in asking any counter jockies for advice, 99.9% of them have no clue what they are talking about.
The only problem I have with 1911's versus Glocks is weight. Many people talk about clip capacity....if you can't hit what you're shooting at at least once or twice with 8 rounds then you should probably stick to baseball bats. If you NEED more than 8 rounds then you should probably have an assault rifle

In the extreme, the only thing more reliable than a glock IMO is a revolver. Though the fact that the 1911 survived over 70 years in military and law enforcement service shows that the gun does it's job. And modern "upgraded" ones are that much better.
I figure the most effective gun is the one you're most comfortable with and find YOU can shoot best. Everyone loves a different flavor.
If there were any ONE right gun out there I don't think so many companies and models would be out there
