Thanks for all the forum advice chaps. Decision made. Tomorrow morning I'll be ordering a Quad Pro 2.93 with 6GB Memory, 640 GB HD (I'll purchase an additional larger drive later) with the upgrade to the Radeon 4870. Oh, and the 24" screen plus Applecare. Even with the education discount this comes to a frightening £3155! That's $5174!! I must be mad. Any objections just get them in by tomorrow morning! Dear God, please let this last me as many years as my dear old G4...