Jocelyn84
Thanks for your reply and for the links you suggested.
By the way you were born when I was 16
As you probably know I have two simultaneus goals: architecture and music composition/hard disk recording with MotU DP6.
That's why I'm thinking of a 3 HD system where one 750GB HD contains just applications and settings and the other two contain sample data and music and architectural works.
The processor will be an Intel i7 950, instead of a 930, with 12GB of RAM.
About the motherboard I'm still undecided between UD3R and UD5 although the first was more tested...
I'm also worried about DSDT as a postinstallation procedure... I wouldn't create damages to the system.
I'll be back again with a complete hardware list before I buy.
Thanks
Michael