[RarlyL8]

The romantic in me wants a nasty 3.6/3.8 NA beast, but the insane cost for so little power just makes it a bad deal.

I went through that exercise as well. Bought a 3.3L 930 engine that needed rebuilt and played with the idea of big cams, C/R and PMOs. My mechanic friend said why would you spend all that money for less power.
The draw back of the 930 is that you can't do anything to the body that won't hurt value. You can add power parts no problem as they are easy to remove, but adding 13" flairs or fiberglass parts involving paint kills resale. With the SC you have a wide open pallet to work with. If the mods are done high quality the car actually may retain it's value. Mine did, after I sold it of course. The guy I sold it to flipped it a couple years late for over double purchase price. The recession is over.