Just checked out your system. Very Nice !!
I am building my own speakers but with much less experence thay you. I want the pure single driver sound so I have a pair of Fostex F120A's. Sweet is all I can say. I don't do wood work so well so I am having some cab's built out of Hickory (rock hard and solid wood) We will see how they sound when I get them completed. DIY can be really fun.
Mark