I have an m1a with a Springfield mount currently on it. I am not a big fan of this mount, and would like you guys to tell me about some better options.
+1 for Sadlak. Also check out Basset mounts. They are both great mounts with great customer service. There is also a lot of good information over at m14tfl.com.
Sadlak or Bassett. Another site chock full of M14 info is The M14 Rifle Association. See also a post in this section started by waveslayer about his 14 stringing shots. Good luck and good shooting!
I have a Bassett Low mount. Got it used on the M14 Forum. As others have said the Sadlak Airborne is a great one also. You can always look into the SEI mounts. Dont go cheap on it though. I have seen many a shooter pulling out their hair trying to get accuracy out of their M1A with awesome glass and a cheap mont.