Currently it's about 10% Squeezebox, 90% Arcam.

I haven't yet done anything about improving the sound of the Squeezebox. It trails some way behind the Arcam. I'm not convinced that simply changing the power supply is going to make enough of a difference but I'll give it a try some time soon.

I found a couple that may do the trick:

http://www.stontronics.co.uk/productdetails.cfm?lproductid=3

http://www.lascarelectronics.com/PRODUCTS.CFM?STOCKNO=PSU 20105&CFID=13852724&CFTOKEN=62348064

Or should I build my own