I can answer two questions. MF produced a matching X-tuner, the X-Plora: http://www.musicalfidelity.com/mf/en/Products/archive.jsp?pid=3282
As for the X-Psu, I've bought one for the X-Pre, and it made a big difference (improvement) to the sound. Since it has 4 outputs, you can power multiple X-items (excluding powerhungry items such as the poweramps offcourse), so it seem like a good buy IMHO.
And as for the sound of the X-pre: I really like it, and bij changing the standard Philips tubes, you can easily alter the sound to your taste. Bear in mind though that it is a minimalist design, having only four inputs.
As for the X-Psu, I've bought one for the X-Pre, and it made a big difference (improvement) to the sound. Since it has 4 outputs, you can power multiple X-items (excluding powerhungry items such as the poweramps offcourse), so it seem like a good buy IMHO.
And as for the sound of the X-pre: I really like it, and bij changing the standard Philips tubes, you can easily alter the sound to your taste. Bear in mind though that it is a minimalist design, having only four inputs.