I'm not much of a fan of lambo-doors either, but paint sounds interesting.
The Antenna, you'd loose the functionality of the radio if you chop the Antenna and go with a Shark-Fin. It also won't work because the shark fins are designed for XM/Sirrus modules. the Flexible black ones really aren't that great with reception either. You could attempt to swap the radio with a newer one from Pioneer/Alphine and see if they have a antenna replacement option.
Bodykits, you have a large selection, but getting most of them to fit would be your biggest challenge.
Good luck, it sounds like a interesting plan.