panel speaker purchase

Eminent Technology comes to mind as a possible Maggie alternative, using push-pull rather than single-ended topology as I recall.

I think that Beveridge and Janszen are back in production, under the direction of Harold's son and Arthur's son, respectively.

Gilmore Audio makes a couple of ribbon/dipole woofer hybrids that are can play very loud.

In my opinion, the Maggie 3.6 is real hard to beat in its price range.

Duke

Eminent Technology should not be overlooked, VMPS, NewForm Research, Innersound Eros used can be had for a good price, I own VMPS, Innersound, Magnepan, the VMPS I own has the Bohlender Graebener Planar Ribbons in them, again call Bruce Thigpen at Eminent Technology....great guy and a great product that I never owned but came close and did a lengthy audition of.

http://www.acoustat.com.cn/en/index.asp

Check out this link. The site is a little slow but interesting.

Is Yankee Audio/John Taylor still around? They made a great full range ribbon system.

Lesser known hybrids:

Ambience, A.R.T. (Advanced Ribbon Technology), BKS, Davidson and Soundline. There's more I'm forgetting right now. Some of these claim to work with low power tubes. (?)