Solo Green and the PSU1

This person is claiming that it does -  http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=110218934249&ssPageName=STRK
If you bought it you could let us know :P
Others have stated not.

The design brief, as I understand it, was to equal or exceed the performance of the existing 2007 Solo Monitor Class (uses PSU-24 linear PS) using only a simple SMPS.
Most evaluations by those with more experience than me have concluded that the brief has been met.
Given your circumstances, I would seriously suggest that you consider the Voyager portable amp, I have personally given this unit a lengthy evaluation using full size headphones (AKG701 and ATH-W1000) and whilst it may not equal the Solo, it is very, very good and has the advantages of portability, extended battery life, reduced gain for use with IEMs, a contour circuit to compensate for cheaper "street" phones and an input socket suited to an ipod or similar source.  It is also cheaper than the Solo.

Although I haven't heard the PSU1 with the green solo just  the stock wall wart going off the Rockgrotto threads it shouldn't sound that much better. I only ever had poor head phone amps (built in) and took the comments from Graham and the Rockgrotto dwellers that the Green Solo would be pretty much all I would need so I took the PSU1 money and bought some ATH A900 Headphones and quite frankly it's the dogs doo dahs.