Matt,
You wild and crazy guy.
I'd look real hard at an action from these guys.
http://www.x-tremeshooting.com/ Then i'd have the good Mr. Chris Matthews screw on one of his carbon wrap barrels.
As much as I like both of the rounds you listed and I do like them alot.
I'd have Matthews do up one of those TI recievers in a repeater for the 338 NORMA.
The 338 NORMA will do just about anything a 338 Lapua will do with the 300g MK and 10g less powder....Just ask Mr.Matthews
Not a big ACIS fan and not a fan of that rounded crap on the forend of the A-5.
I'd look hard at the A-1C or the A-4 with edge.
What can say,I like flat forends.
At least with a flat forend you can bench the thing right.
Im sure you can find a S&B kicking around somewheres to top it off with.
dave