I was looking at these too (waiting for my full salary to get reinstated again some day).
What about the POF 308-MRR > http://www.pof-usa.com/p308/p308.htm
or the LWRC .308 REPR > http://www.lwrci.com/p-120-repr.aspx
I was also looking at the Knights M110 SASS > http://www.knightarmco.com/m110.html
until I saw someone selling it as a "deployment package" for $20k.
The SIG716 has some promise also.