I would recommend a perpendicular drive such as the Seagate ST980815a. This is the ATA/100 version of the ST980811as (SATA) which is on the chart. It's a 5400rpm drive with performance nearly that of a 7200. Better bang for the buck than a 7200rpm and it'll have lower power draw and produce less heat. It's only 80GB but I got around that by putting my old drive in an extremely portable 2.5" enclosure (it's powered solely by USB), so I have 140GB available. ...though if money is burning a hole in your pocket you should get the 160GB version.