I'll be honest- I'm a fan of keeping it simple. I think 356's in general (and especially Speedsters) are pretty hard to customize- too much and it's starts taking away from their iconic shape and just look junked up with add-ons. I give the SEMA Speedster (with the Magnus Walker wheels, which btw I thought looked bitchen on that car!) of a couple? few? years ago as an example; from the outside the car hit all the right buttons, until I (and a number of other here) saw the interior (and frunk, and engine compartment- I mean, really- who the h*ll hangs red leather in a Speedster engine compartment???). A little gaudy doesn't begin to describe (for me, anyway) the upholstery (and all the other crap in that car. I think someone here called the builder's vision a cross between a Parisian bordello and Russian museum.
All that said- I think most of the stuff you're talking about could probably be done tastefully. Keep in mind a couple of things, though- "just because it is different doesn’t necessarily mean it is better" (your words) and (to quote Uncle Stan) "it's a big tent, and there's room for everybody". It's ultimately your car, so do what you like. Not everyone will like everything you do, but if you build it by committee and try to please everyone that probably won't work either. PS- just remember your words above.
I hope this helps. Al