I may suggest going the 260 remington or 6.5x47 route.....maybe you could even pro-deal just the receiver from Remington and build the gun with stock/barrel/trigger you are really going to like...and have enough for a SWFA SS scope secondhand.
My first rig was a 308.....love it, but the 260 is such a sweetheart that it really steals the thunder from most anything else incl 300wm...esp in $/shot. If you are doing well with iron sights to 600y, a sub-par scope will probably just plain piss you off.