If your nephew were to get you a muscle car of these years/makes and models, which would you pick, if you could?

A 1967-1969 Camaro RS/SS?
A 1970-1973 Camaro RS/SS?
A 1970 Chevelle SS?
A 1968-1969 GTO?
A 1965-1969 Mustang?
OR
A 1970 Charger R/T

I’m looking at building my aunt a muscle car for her 36th birthday, and need to know which is more popular with women.
I want it to be a surprize, so I cant really ask her, and I can’t ask her what muscle car she dreamed of in H.S because she’d put 2+2 together.
A hint on how they’ll be built, the chargers engine will be an all aluminum 540c.i fuel injected hemi-all else, will be built accordingly.

Thank you, I really appreciate all of your input!
Oh, and yes, she loves muscle cars.
Her first was a ‘67 cougar, but it wasn’t what she wanted.
I cant talk to her about it, because I own 7-and often build cars for others.
As far as fuel efficient, not something my family worries about.