To my taste O-PCE is the next grial after MXE, so:
MXE>O-PCE>3-meo-pce>3-meo-pcp>the rest (havent tried the 3-ho´s yet)
Sure MXE was more magic and serotonergic, but OPCE is the closest next big thing. I dont get if it´s a very personal preference or it´s just than people have not give it´s oportunity. Probably the latter.
It´s super euphoric, generative of disso-internal-spaces and easy to hole into too. And quite potent by weight.
The 3-meo´s are more energetic/speedier, less body holing and way less disso spacey, so, basically dissospeeds...