I think b vitamins will help and omega-3s are basically good for everyone. Apart from that I am not sure.
My body is in much better shape and I am similar to you in that I never suffered "horrible" physical consequences.
The most noticeable thing is that my brain and cognitive function is VASTLY improved. I notice this mainly in therapy. I was in therapy before and am still in it and my ability to track myself and notice things and make connections is like night and day. It is really amazing. Honestly if that is not a case for abstinence I don't know what is.
Apart from that my body is much more muscular and leaner due to working out and not ingesting booze. Everyone notices and comments. I have a flat stomach which I didn't have before and I pretty much eat what I want. My skin looks amazing although that took some tweaking on my part (aka products, I hate adult acne).
As for research I would look here:
Welcome to NIAAA June Russell's Health Facts: Alcohol - Brain Function & Memory