> 	I've played another version of tetris where the next-block
> 	display was toggled with a key, and having it enabled reduced the
> 	scoring slightly. 
If you want to be faithful to real Tetris (i.e., the Russion PC program)
you need to reduce scoring when next-block is enabled.  That's why it
should be selectable on a per games basis.  BTW, I consider playing with
that option on cheating. :-)

     -- Lennart