Hi Robert,
First of all, welcome to the Circle.
I know you are in the market for a Squeezebox, so i assume you are planning to use the new amp with it.
That beeing said, you can exclude the preamp issue, because the SB drives the AKSA amps easily and it has internal volume control. Plus if you cambridge as outputs and you need source switching, you can connect the SB to the cambridge, then the cambridge to the AKSA.
The AKSA power amps come in 3 versions : Stock , Nirvana upgrade and Nirvana+ upgrade. I would recommend the N+, but even the Stock unit i BET MY HEAD ON IT --> It bests your Cambridge. The N+ will simply BLOW your amp away, it is a very refined machine.
Your best option is to contact Hugh Dean and ask him the possibility of a build kit. But my bet goes to that you can build it on your own. Do you have any electronic background ? Do you know how to distinguish a resistor from a capacitor ? If so....that is all there is to it.
The aksa's come with a full manual and instructions, you just can't go wrong. All you need to buy is the KIT plus transformers and a case. Its really simple. I am in Europe so i can help you with sourcing parts.
Plus if you browse the forum a litle you can see that all users get feedback and its just a matter of time before they solve their issues. NEVER, NEVER there was an AKSA that was left unbuilt !
I dont believe there are Holland native Aksaphiles but i may wrong...perhaps Hugh can help here ?