Personally, I am going the rough route, naturally aspirated...
I know all the pros and cons of both setup but I don't know,
na seems more appealing to me, and more ''unique''
Im not sure but cant you just get a port and polish job done to your head with forged rods and forged pistons that bump compression to 12 to 1 and get the crank cryoed and have just as much if not more than turboed.