Please pardon my blunt response, but if you just want to buy new gear and have money burning a hole in your pocket, OK, buy a new rifle and whatever else you have on your Xmas wish list. That can be fun in and of itself and there is nothing wrong with having some new toys. But, if you are serious about hunting out to 600 yards, I submit that your entire approach is bass backwards.
I see people on this site on a regular basis who want to buy all kinds of gear to help them hunt at long range, but are bound and determined to use factory ammo. That's like building an expensive performance car and insisting on feeding it 87 octane gas. I see a guy willing to plop down $2k for a custom rifle and who knows how much for a scope, but is balking at the cost of decent bullets and doesn't want to handload. Again, completely backwards.
It looks to me like you already have some decent candidates among your rifles. If you are serious about your stated goals, the place to start is with a basic loading setup. You can get all of it for less than what you would pay for a moderately priced scope. Pick a rifle and baseline it with factory match ammo or a book accuracy load to see what kind of accuracy potential it has. Tweak the rifle and scope combination from there, if needed. Then, spend your time and energy loading good ammo and working on your wind and mirage reading skills, range estimation, and shooting technique. When your equipment becomes the limiting factor, THEN it may be time to commission your custom rifle.
+1 to this answer..... lets say you test factory ammo in either gun you have now? Neither of which will produce ammo that "could" produce better ammo then what can be tailored by handloading! You will spend a lot of money testing box after box looking for what might work best in either rifle.
Why waste those funds in the first place and just start reading up on handloading and get started doing it? If not find someone that will do the work for you and/or either help you get started?
Once I started handloading to a specific rifle and tune the load, I never looked back at buying factory ammo ever again. I used to waste my time and money trying every factory box ammo in the guns I had and used the best one I found, but they never produced the kind of accuracy I can put together through handloading.
Your Wby. Vanguard is a great action, I used one over a decade ago as a 7mm-08 Remington build that made 600 yard shots look easy with my handloads, and took a lot of game. The question is which stock it has? I was lucky enough that mine had the Fibermark stock which was a all fiberglass stock made by H&S Precision for Weatherby. If it's a cheap plastic stock you'd be better served to find something better and have it bedded properly.
Same thing for the 700 ADL, something needs to be addressed about the magazine box? As well as the barrel length issue? The 7mm Remington Magnum is a great round, but having a 22"-24" bbl. is not going to produce the kind of velocities the cartridge is designed for, some thing that just helps increase velocity without pushing the case design to the max with a given bullet weight. This gun should have the trigger either worked on or replaced and a bedding job if you chose to go this route?
I'd look at how much to want to spend and spend it on one rifle first and reloading equipment. Either rifle has to be looked over as to which would make a better platform to begin with and what needs to be done with it first?
In the end depending on how good either gun will shoot with handloads it will take some funds and time to get the best results. If you decide to spend some more money have a good barrel installed by an experienced gunsmith or one of the barrel manufactures, Hart Rifle Barrels, Shilen, or Krieger.
The handloading will take care of what goes down range tailored to the gun. The scope just needs to any good 3.5-10 that wont fail with abuse from field use and during recoil. What you have in your hand as far as name or caliber doesn't matter as long as you can put them down range where they belong accurately 90% of the time.