Alpair 10 more forgiving than Alpair 7 & 12

I was looking at wooden design cabinet designs and the megalith series caught my eye. They compared the Callanish (Alpair 7) to the Silbury (Alpair 10) which states

Silbury is "Designed for general listening duties in modest - larger spaces with still greater power-handling and scale over Callanish, and a richer, slightly warm tonal balance."

I figure I might try a horn cabinet before a fonken with sub. I just don't know if this will work in my 11 X 12 room.

Since they are beta testing, would I get a discount on the Silbury plans?
 
Forgot to post the picture.
 

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