From another (former) graphic designer:
NO SLOGAN! No offense, but I have to believe your suggestions are tongue-in-cheek as your current card is infinitely more professional than any of your slogan ideas. How could the same person come up with both?!?
No slogan is necessary, "eliminate the nonessentials." Adding one would probably be detrimental, and the style would have to be conservative, dry and professional to match your layout (ex. "Exceedingly funky like a bow-legged monkey" j/k).
The card is fantastic as-is, except some minor layout issues. Looks very much professionally done, you should be proud. In fact, sometimes designers get so caught up in "designing" they forget to keep it simple and great, like your card. Good job!
As to the layout issues (opinions on this not solicited, I know), I would restate for emphasis these points made by others:
-Larger type size
-Larger edge margins (not only for trimming issues, but for looks, too)
-Bold face for Name and Phone Number