TRy Halfords.-----Last month they were selling a PDA------ Medion 100 for £199. This has a Sat Nav system with screen mounts and also bicycle mounts. Windows media player, excell, word etc. Plus a voice note recorder and many other functions. It syncs easily to a laptop or desk top.
Sat Nav is super ---it shows streets in this country . If you want any other Europe country it is on the supplied CD which you download to your PC and then load onto an sd mem card---just a normal mem card as in digital camera (about £24 for 512mb)
Its so good I purchased two---one for me and one for wife. It also works in our cars that have a heated front screen. Hope this helps
PS Halfords were advertising a free demo