Mr P. My power supply was built by an electro geek... all I know is it has comparable quality to the PS1. It is home made in a box, and does a great job. My advice would be that the PS1 is an expensive luxury, and to be bought if you can afford to without worry. If not, press all your cash into the Slee.
As for interconnects, due to having to remodel my lounge for the wife's tastes, my cd has gone. I use my ipod with lossless files, with a high quality interconnect from the line out (ipod) to RCA. OK... bit overkill to use the Solo with an ipod, but it is fine for me. That is one reason why I sold my GS1000's, as I didn't have the set up to do them justice. I can get a great price on a set though, new, if you are interested! Amazing cans.