No, Greg, I haven't.
I was assuming you were using the originals based on the review gear listed in the VR-33 review (hint hint

)
I would certainly agree that midrange bloom and air are two areas that could be improved upon over the originals. I could never get the sound to want to leave the speakers with mine, if you know what I mean.
(I was actually thinking "how the heck did he get the -33s to sound that good with those amps")
Glad to hear that the MK IIs are singing for you!
-Mike