Windows vs *nix?

[ykud]

Hi there.

I've only worked with TRN on windows, so it's very interesting to me, whether it's any better on any *nix flavor?
My current client has  a 4+ Gb cube with 6 hours of build time and looking forward to decrease it.  No splitting to smaller cubes, no changes to model, no manual partitioning can be done, let's assume.
I'm thinking of a nice standalone fast-cpu wintel server with a decent controller, but...
Maybe I should go look out for pSeries monster? Since trn is 2-threaded, I won't gain much of smp architecture (let alone build other cubes in parallel).
Or a Solaris one?
Or get a an x86 and try to compile a lightning-fast gentoo with trn linux x86 build?

Any suggestions?

[COGNOiSe administrator]

My preference is Windows. Always Windows. Never worked with pSeries thou, and to think of it, without all the Win overhead it might be an interesting contender.