The only #1 I've owned was the .416 Rigby. This rifle was wonderfully accurate, the trigger was close to perfection, it was reliable, and a pleasure to own and shoot, but there are a couple of issues that you should be aware of.
I had two butt stocks crack, the reason was ultimately determined to be unven bedding at the tang. Once this was addressed there was no further problem.
The scope mount on some models is inletted in the quarter rib. It seems that more folks are unhappy with the eye relief provided on these rifles than there are folks who are happy. I had a custom quarter rib made for mine that would allow the scope to mount in such a way that the ocular lens was even with the face of the falling block. Thus mounted, there was nothing in the way of the loading port and there was no way I could get tagged with the scope when the rifle recoiled. Other folks have complained that the scope cannot be brought far enough rearward for them to achieve a full sight picture, with what are probably high power scopes with more critical eye relief.
The flip up rear sight was a waste of time, its the cheap Williams variety, and could not be adjusted low enough to bring me within 6" high at 100 yards. An after market aperture sight is a better answer, but a higher front sight is required in any case.
My rifle was carried over long distances on foot. It was distressing to me to unsling and find that the safety had moved to the fire position. I saw no way to resolve the problem, and because the rifle had to be carried loaded I just made sure there was no one on my left side, and slung the rifle muzzle down so 100+ grs of powder didn't go bang beside my ear. I never had a problem, but the situation was not comfortable. Attempting to carry the rifle loaded with the action out of battery resulted with decorating the tundra with expensive ammo and an empty rifle in my hands.