Most of our
ICT suite is P600 but upgraded to 256-320mb of RAM. The only thing they can't do is
-run the IWB (well they can, you just can't use the rubber).
-run photostory (they can but when you do the preview the voice is out of sync with the picture)
-photo editing (again they can, but it's a little slow with 3 megapixel pics so folks just reduce the size of the picture).
Logon time ~30 seconds (with roaming profiles) and they can do 640x480 short movie editing with no problem.
Half of the pcs are 1.2ghz ish and nobody has ever noticed which half of the room is slower. They run windows xp, office 2000 and McAfee antivirus + the all normal primary school cr**p. We've only just got rid of our p450s, and that was because we upgraded them rather than because people were complaing about their speed.
Not ideal, I know. And I am looking to replace them. But if you are really tight for cash see if you can pick up a load of old RAM and consider reconfiguring Sophos. A 10 minute logon would sound to me like another issue (DNS perhaps, heavy profiles - do a search on here for plenty of ideas, there is also a patch you can get for xpsp2 that takes 20 secs of the logon). I re-install them at least once a year, keeps them fresh. (I have an automated system, so it's easier).