I have big news !
This is great news.. but I must admit I'm more intrigued than ever. Despite Czornyj's explanation of using a colorimeter, specifically 1i2 and Imatch3, this combination is not only working correctly on tons of wide-gamut monitors.. but are in fact recommended and listed as compatible with wide-gamut monitors. Yes, there might be some minor differences at the fringes.. but not enough to using anything else if it costs you even a single dollar.
And in fact.. I'm using the 1i2 puck with my wide-gamut (NEC LCD2690uxi2's) monitors with excellent results.
So no, I don't feel this is a general mismatch of hardware and software.. even as you say you're still using the 1i2 hardware.. just different software.
So the real question is.. what is it about this software that's causing am incompatibility with Eizo Flexscan monitors? My guess is nothing.
My guess is something else in your system.. and I say that because many other people are using 1i2 hardware pucks and Imatch3 software with their Flexscans.
I'd like to find out what it is.. as much software as you've loaded, deleted, loaded, deleted, etc.. something was left behind. There's a chance.. not sure how much of one.. that whatever was left behind and is causing issues with Imatch3 and not the other.. will come back to bite you. When and how deep the bite who knows..
Look at it this way. There are many Eizo Flexcan's using 1i2 pucks and Imatch3 software to properly profile them. Why won't yours? What have you ruled out..
1. The monitors appear to be ruled out.
2. Win7 is ruled out.
3. The 1i2 is ruled out.
4. This leaves.. the Win7 build and remnants left over from previous installs.. your copy/version of Imatch3 (I'm assuming you're using the Win7 version? It's the latest update), or procedure/technique.
I'm curious.. But I totally understand you'd like to take a break from this and just process images for a while..
If it were me.. I'd wipe the system and install Win7 from scratch.. The most currents drivers.. install a basic suite of imaging software.. just CS5 for instance.. and then I'd profile it again.. If it works with the minimum.. I'd install one piece of software at a time, reboot, check.. and continue till the build is finished..