I disaggree with many on the Desert Eagle. It is just not for someone with small hands. I put quite a few rounds through a .44 DE that I bought back when they first came out. I never had a problem with the gun, even with hollow points. The recoil springs mean business, and will definitely chamber a round.
I successfully deterred a crime with one, and no one can dispute the OH**** factor of the muzzle.
I don't think it is the best carry gun, but it appears that he has 3 guns in mind for various purposes.
For carrying I also would not recommend a .454 Casull premiere grade, or a MAC-10 .45 with 40 round clips, or a U.S. Army issue XM-21 sniper rifle with a 3X9 AR-TEL scope, or a Soviet Dragunov, but they are all fun to shoot. Beauty is in the eye of the beholder.
The good old model 1911 works, as do the Berettas, Sigs, HK's, etc. For a carry gun the more important issue is training. Double tapping helps your odds, too!