I never found much reduction in flip from the ones I've tried. .45 ACP is fairly low pressure compared to other rounds and there isn't quite as much gas pressure to make them really effective. They do add some forward weight, and some length that can make finding holsters that fit a pain unless using open ended holsters.
But you can watch and see if it looks like it makes enough difference for your needs.
I shoot Limited and Single Stack so I don't have any pistols with comps and I've never shot a 1911 with a comp. I have had the opportunity to shoot a couple of 2011 open guns with comps (.38 Super and a .40 S&W) and there is a difference. These were two of the flattest shooting pistols I've ever fired, but they were finely tuned with spring weights, ammunition loads, and the comps all working together. As mentioned in an earlier post I don't see the point unless you're planning on shooting in USPSA competition. If you decide to go with a comp have good ear protection because they are loud.
Once you have had a wonderful dog, a life without one, is a life diminished. - Dean Koontz
STI Eagle (2), STI Trojan (2), STI Edge, STI Guardian, STI Sentinel, STI VIP, STI Ranger, STI Tactical 4.0, STI Rogue, STI Escort, 1943 Remington Rand 1911A1