Leviathan Signature Monoblocks -- What is the vir

The review just published on Stereo Times of the Red Dragon Leviathan Signature Monoblocks amps reminded me all of a sudden that the temperature outside my home in Austin is over 100F, and that turning on my beloved Jeff Rowland 7M twin furnaces for the simple purpose of making music will once again turn my loft into a dry sauna. What can I say, the darling old girls are just not Texas friendly. If I ever get around retiring them, what shall I replace them with? The ideal candidate will need to be both Texas friendly, and be able to drive planar speakers having 83 or 84DB efficiency with aplumb. So, how are these new contenders in the high efficiency monoblock market? Are the Red Dragon Leviathan Signature monos as stellar as the reviewer claims, or are these merely competent 'me toos' in the fast crowding ICE marketplace? How do they compare to the Rowland products (501, 302, 301)? Or the Newforce amps, or the Bel Canto Ref 1000? Do they sport the dramatically low 8K Ohm impedance that would limit their use with 600 Ohms fully balanced linestages like the ARC Ref 3?
And ultimately, how do they compare with more expensive traditional designs, like Theta Citadel, Pass 600.5 (I know I know this one is also a furnace), or even my own old Rowland 7M monos?
Finally, before I forget, here is the link to the Red Dragon Leviathan review on Stereo Times .