odyssey extreme compared to odyssey mono's

I am thinking about upgrading from the odyssey mono's to the extreme. Is the upgrade worth the cost?
You can find some discussion of this at audiocircle.com under the manufacturer's discussion site. There are positive reviews depending on your system needs.
i talked with klaus at he2003 and he described to me what he would do to modify my monoblocks to the extreme. I am on the list to get them modified in august. i was impressed.