John -
I have a brand new boxed pair of Sony Vaio PCGA-SP1 speakers which I'm about to sell (ebay if necessary). They sound fantastic; I just don't have a need as I've got a surplus integrated amp and a pair of QED Arias which I can use with my PC. Where roughly in the world are you located please?
If you're not interested and/or you've got space for more kit (!), I can recommend scouring the Richer Sounds or Hyperfi adverts for a low-cost integrated amp and wee speakers, which will give you more volume (but cost more...)
L