My motherboard has gone and died on me

Now I can build a whole new system

What do you reckon I should aim at?
I have vague requirements.
  1. Quietness is fairly important
  2. Looking good i.e. not a beige case
  3. I don't have unlimited cash i.e. over £1k is too much
  4. Cool technology factor i.e. Galium cooled GPUs etc


It is never the time to get a new PC because you always want something new.
However, do you think I should wait for more mature 64 bit processors / operating systems or multiple processor cpus or just get what is around now?

Anyone have a fantasy system that they would like to post to get me going with ideas?