[b]Don't buy an M1A M14 unless your are nostalgic![/b]
Actually, I had an M1A, with a Kreiger 1-10, custom built-up by Clint Fowler in Virginia.
It was a nice rifle - for awhile.
In the book, "The Competitive AR15", author Glen Zediker called it best when he said the the M14 accuracy was "here today, somewhere else tomorrow." :) Unfortunately the M14 does not stay tuned w/o the services of a gunsmith. The reason the USMC pioneered the double-lugged receiver was to improve stability, and make the bedding last longer. Even so, the M14's need rebedding every so often, and the gas system is finicky.
When my accuracy began wandering with my M14, I came to the conclusion that I either needed to send it *back out for rebeding and retuning* or [i]step up to a gas gun recoil system that required less tuning, and stayed put.[/i] Thus my move to the AR10.
Whether I stay with the AR10 or go with an H&K, the one thing I would never do is go back to a weapon that uses a gas piston and operating rod!