Do you want the easy answer or do you want a challenge?
I shot and qualified with the M14 in my Navy days. Will never forget how easy it was to put rounds on target, based upon the inherent accuracy, excellent sights, and good (potentially exceptional) trigger.
Personally, the ease of making good shots, the current cost of the M1A and .308 ammo turned me away.
Today, I like the challenge of something unfamiliar, and making it work. As much as I loved my experience with the M14, that was 32 years ago and even if I had one now, my eyes and stability will never be the same.
Do what is right for you... And if you can afford an M1A and the ammo and have never fired one, do it .... just remember that it is the easy answer.
Best of luck and let us know