I was where you were (sans selling a .50 BMG) a year and a half ago. I have a Savage 10FP as my tactical .308 machi'ne of long range choice. The AR10 is an awesome platform and is relatively easy to acquire. I think it beats the 91 platform for your question, but for me.....I have been shooting AR's forever and a day via the Army and my own purchases. The AR platform is cool but I wanted something different.
The 91 is just plain sexy to me.....just sayin.