Being different can be more $$$. The reason most guys choose a 350 SBC is it is cheaper and a proven performer. Want to be different? Tattoo your face.

Good point BIG,
even over here it's actually cheaper to buy SBC parts than most European or Japanese built power plants.
Plus...the aftermarket is set up to cater for the SBC so much more than any other engine.
For example my friend had a Nissan Skyline that required 1 cam follower, I could buy a complete set for my SBC and
still have change left over compared to the Nissan part!