Just remember fellas - while a compensated/ported barrel can help reduce muzzle flip and make for more accurate follow-up shots & double taps, it's not a great idea for personal protection.
Chances are any encounter will be at night. And the flash from a ported barrel will blind you in low-light. So the follow-up shots might be more accurate, but you won't be able to see what you're aiming at anyway.
I can attest to the amount of muzzle flash you get with a compensated pistol. I was at an indoor range when a guy was shooting his Comped 1911 chambered in .38 super!!! The fireball out of that this was very impressibe, and extremely loud. It made my fricking head hurt and I was 20 yards away. I was wearing custom silicone earplugs and really good ear muffs.
I would buy a compensated barrel more to have fun at the range then hoping to carry it.
I'd actually be interested in getting a threaded barrel just so I could have someone make a restricter disguised as a compensator... then I could use an M9 or M40 with blanks for movies instead of using the plugged barrel cheapies I usually use...