You will remember Peter's photo of his Beogram 4000 & Beolab&Beomaster 5000 combination.
When I got my Beolab 5000, I knew that one is supposed to combine it with the Thorens 3000 Bg-- but I kind of feel that having a Bg4000 with these units is great, both because it's all Jacob Jensen, but also because they really go well together.
So, there you have it: proof that Soundproof is a CopyCat. (Apologies for the cell phone photo!)
The Beogram 4000 is rosewood, which actually goes well with the darker, aged teak of the two other units, and also fits with the black side panels of same.