>>Which of the suggested machines (Blade 1000, 420R, 280R) have the best >>memory bandwidth and lowest memory latency? > > > If it must be rackmount, go for the 280R (US-III based) versus the 420R > (US-II based). > 280R is a nicely-put-together box. I administer one (ha, and they PAY me, too) and like it very much. Steve