I shoot the whole .308 family in a number of platforms (,243, .260, 7-08, .308, .338 Fed, .358 Win)... I am a big fan of the .308 case... personally not buying that the .243 is much more of a barrel burner than the .260... neither is much of a barrel burner... the .243 would make an ideal varmint/predator cartridge, but IMO the .260 is a much better medium game cartridge (deer etc...) and in a combo gun, the .260 would be my choice.
I love the thumbhole stocks from Boyd's... they are very comfortable and steady to shoot... but they are heavy... fortunately, I like my guns to be on the heavier side. For scopes on a varmint gun, I would look at a 4-12X as a minimum, a 4.5-14X would be better and a 4-16X better yet... and IMO 6-24X is not too much... lots of good optics to choose from, I am a died in the wool Leupold fan. Bipod = Harris... get a good collapsible pair of shooting stix... If you get the Ruger the LC-6 trigger is just fine.