I had a 52T Mantle for a few years. I didn't like it as much as I like the 1952 and 1953 Bowman, so I sold it off and happily kept the other two.
No point in tying up that big a % of my collection budget in a card I don't really care for, aesthetically speaking. Plunked the proceeds into my investments and while those aren't aesthetically pleasing, either, they are growing nicely.
Oh, and on the Wags question, another Horner portrait card people tend to forget:
My Joe Jackson:
A fantasy card of a banned player seemed strangely appropriate. I got it from Terry Knouse (RIP) at a National. We both had a good laugh over it and he tossed it into a deal. I showed it to Josh Evans (RIP) and he was not as amused as I was with it.