The top gun had the best treatment of the "big d@mn screw" (the only thing that makes metalwork on a #1 a pain...)
But, for looks the bottom "Safari" style is superb. But, for a Varmint/Predator gun you will want a longer forearm and a sling stud in the stock...
Are you going for a "Classic" engraved gun look or something more styled to the "Predator Hunter"... Because in a Predator rifle you could go with a thumbhole stock and a fatter forend in a light colored wood and case hardened receiver for a real "show-off" in contrast... A half Octagon Barrel with some matc huing engraving on the flats... name on one side and caliber on the other of the top three flats (leave the top flat engraved and run matching engraving onto the scope base and rings...
One thing I have always considered to do on a real "done-up-right" custom gun nis to go back to the 60's "Californai Look" a little... I have some pictures somewhere... But, early Weatherbys had that look... Mesquitre stocks and rosewood forend tips... Slight hook in the pistol grip and rosewood caps...