Went to Comet to hear a whole line of docking stations, 4party, logitec, Proline, JBL, bose etc. Listened to mainly rock (Rob Zombie, Chillies etc) The three makes that stood out noticably were Bose, Logitech and Philps. I wanted portable speakers for a holiday so although the Bose sounded easily the best they were to expensive (£170) and to heavy.
For the price and weight the Philpis Fidelio did really well, they and Logitech were the nearest to hifi sound out of the remaining stations/speakers. The quality of the sound out of some of the stations was simply attrocious. Iv'e read reviews and people have raved about sound quality of various products and I can only guess they hear differently to me.
In summary for sound, Bose 10/10, Philips Fidelio 7.5/10, the rest about 2-3/10 (to be fair the some of the Logitech stuff sounded good (7.5-8/10) but I have read to may complaints that they turn themselves of at quiet moments of music to entertain them.)
So, good sound, mains adaptor with 3 pin and 2 pin for hols, battery operation if needed, 3.5mm jack lead for mp3 connection and my ipod touch 8gb docks straight in, light and looks ok imo.
Its not hifi good but music is still enjoyable. I can't recommend highly enough taking your mp3 to a shop to try them out.
Hope this helps. :0)