What rifles are still chambered in .260 Remington or are you going to have one built? It would be pretty cool to build one one with a 1-8 twisted barrel.
I can't say I personally would want the standard 1-9 barrel but a 1-8... The only reason to have a 1-8 is to shoot 140 grain VLD target bullets. My 1-9 will shoot everything else- for some reason, it even shoots 130 Norma target bullets. 1-8 would not be ideal for the lighter bullets though.