Martin Logan or Sunfire for surrounds?

[Acoustat]

I think I'm sold on ribbon tweeters in my surround channels.
I plan on buying a pair of rear channel surrounds in the next month or 2.

I will be running 4.1 when I get them and my sub.
I've been looking at Martin Logan Motion speakers a lot lately
from the Motion 40 tower down to the Motion 4 and even a few of their
used ESL hybrid Motion speakers on ebay. I would prefer the Motion 60 towers
in case my Acoustats go down, to cover a wider frequency range, though I might
just buy a pair of Magnepans if that ever happens and I cannot get them repaired.

I'm heading to N.E. tomorrow and might have a chance to audition ML speakers
along the way. Has anybody any comment on the Sunfire speakers?
http://www.sunfire.com/productdetail.asp?id=26
They certainly don't cover the bass bases very well, but would handle all the power
most of us could throw at them, but it's not about power so much. (150W and up considered)
Aesthetically the Sunfires win out. They just look mean with finesse. 117db SPL

One other option is the SVS ultra surround, as you can run 2 separate channels in/out
of each one http://www.svsound.com/speakers/ultra-series/ultra-surround
but they have no ribbon tweeter, and like the Sunfire, are rather pricey to the point
I could get a pair of used ML EM-ESLs

If you vote or not, it would be splendid to share your reasons.
There's no wrong reason here. Looking for feedback on two major brands in particular
Martin Logan and Sunfire.

 

[Acoustat]

a late entry change adding the Sunfire CRS-3 which skews my original order of interest.
http://www.sunfire.com/productdetail.asp?id=18

The ML 15's are atop my short wish list as they can be excessed to another channel later.
I am concerned with their size and rear port for behind our couch.
They will be either on a back wall shelf or preferably on a stand.

http://www.martinlogan.com/motionSeries/specs.php
Here's a spec link to the ML Motion series for comparisons

 

[Acoustat]

So nobody has any experience with Sunfire cinema speakers?
Should I just save my money and go with the ML 15s?
Borne of the heritage they are, the Sunfire products should excel
But if the MLs gave them a run for the money...

 

[Acoustat]

Auditioned the ML 15' and 40's today.
They weren't comparable really.

When listening to the 15's, switching to the 40's
Was like taking a blanket off of the speakers

Now what guage wire for 25' runs, 12 or 14g.?