Case: Antec Aria, ultra quiet case with damped panels. It that's too small, try the P180. See
here.
CPU: You can look around for a 533 FSB, but I can't track one down. However, see
here, where they happily overclocked a 1.6Ghz 400FSB:
However, there's a set of jumpers next to the CPU socket for manually switching between 100MHz and 133MHz FSB. Using these in conjunction with the Windows utility, the 1.6GHz Pentium M CPU happily overclocked to 2.4GHz (15 x 160MHz) from its default 1.6GHz (16 x 100MHz). At 2.4GHz, the Pentium M proved to be one of the fastest processors on the planet, rivalling a high-end Athlon 64, which consumes more power and produces more waste heat. In fact, the Media Benchmark score of 1.40 is the same as that of an Athlon 64 4000+, which costs £174 more. The average frame rate of 67.1fps in Far Cry at 1,280 x 1,024 with 2x AA and 2x AF also puts most other CPUs in the shade.
Not that I've been looking you understand.
Drop a note and let me know what you get.