Welcome
It really all depends on your taste, style & the direction you are looking to go with your car. For example, Lambo doors would never make it on my list but plenty of people must like them or there wouldn't be the offering.
I would say take your time & find what matters most to you, show , go or both & to what degree. Like I said take your time & find what you want because selling a car with mods can prove to be difficult do to different taste in style. Figure it out & don't just throw money out to do something only to find that's not what you really want & I bet you'll end up with a classy ride.
Also do a good bit of reading & looking at pic's of what others have done & see what you like.