Action wise, I have flipped and flopped this myself for a good while now. I have pretty much decided to buy a Defiance Machine action and build from there. I have turned this over and over in my head till i am about to go insane, fact is if i go custom it will not cost me more for what I *REALLY* desire. It may even end up costing a little less.
Scope wise, I have an IOR 3-18x42 "Flea" scope. $1200, and rice and beans and ramen for a year! I gage my scope "desires" by worst case shots I will take. The latest shot I will take is near dusk, and at that time of day 14x on my 42mm Objective is as far as it goes at 1k yards on a lipton iced tea jug filled with Red Dye Water. I guess what I am saying is, a GOOD 4-14 power scope should be more than plenty for any hunting rig. If i can clearly see ( at dusk ) a 1 gallon jug and engage, then a whole deer, or elk, or antelope ect, should be VERY easy indeed. People who *ALWAYS* desire more mag are usually the ones who don't shoot enough. It is a common desire to *Want* to see the wings of a fly at a million yards before you *YANK THE ***** outta tha' trigger, while closing your eyes and praying for a hit gun) obviously I am kidding with that last statement...but there is a certain degree of truth to it. Too much is just that...
Good Hunting,
Gary