I've owned 3 or 4 with the SX-1.
YOu can't add ram and you can't accelerate them.
The door hinge will break.
The power supply is crap.
Huh? You can add RAM to the sx-1. Not to the cd32 itself, but you follow mention of sx-1 with "you cant add ram and you cant accelerate them". Additionally you can accelerate them with a few different add ons, and even just adding some fast ram to sx-1 will give you a nice little boost.