Thanks for the feedback guys. Yes, I am plenty happy right now...which is why I am proceeding ever so cautiously...if at all. I guess the way I see the ET-2 vs. ET-3, is at the very least...they're a tie. I certainly wouldn't expect the ET-3 to sound any worse (and if it did, well then...I'd could always sell it to someone who didn't think so).
If I found them to sound equally good...but the ET-3 offered the tube-rolling flexibility; however insignificantly beneficial...it might tip the scale ever so slightly. And if OTOH, I found the ET-3 to be surprisingly superior in some respect; well then, that would be icing on the cake and a rather easy choice.
Again...just thinking out loud, and weighing my options (and wallet).