The numbers I've seen say that all the brands are now equally reliable. Maxtors are probably the quietest, followed by IBMs and Fujitsus, with Quantums being the noisiest (I'm referring mostly to motor noise, not seek noise; latest Quantums may be quieter). Fujitsus probably draw the least power (coolest), something to consider for 7200 RPM, and Fujitsu and IBM, being the largest companies, are least likely to go bankrupt.