Best Hardware/OS for TeTeX?

Hi,

what is the best hardware nowadays for tetex? I need max performance,
since I have to compile 23M of TeX source very quick.

My thoughts:

1. CPU

I think faster is better. But how about 64bit v. 32bit? Is a RISC
better then CISC? Hyperthreading, Multiprocessing would not increase
the speed of TeX, wouldn't they? Alpha CPUs are good at floating point
operations, but TeX doesn't perform any?

2. Compiler

For Intel, Alpha etc. there are optimized compiler. Are there any
benefits, if I compile the teTeX sources with these?

3. OS

Well, I prefer Linux, but are the BSDs, Solaris etc. better regarding
TeX performance?

4. Storage

Do I need SCSI? Is ramdisk better?

5. Benchmarking

I couldn't find any benchmarks for teTeX. What is the best way to do
this?

Best regards,
P.