I haven't read the whole thread, and maybe this has been mentioned, but before you decide, I'd suggest handing both the long and short actions (Montana, Classic, or ascent, doesn't matter too much). The long actions have a little longer length of pull, and even though I like my 30-06 Montana just fine, the 308 gets the nod as it handles better for me. Might be the opposite for you, but they are definitely a little different.
As far as ascent or Montana, I'd also go with the Montana. I have an aluminum trigger guard and Ti bolt handle on my 308 and the weight is only 4# 14oz. My 30-06 Montana would be about 5# 5oz if I were to do the same.
