Video editing today and tomorrow

[fabiospark]

Hi everybody.

Video editing PC (Vegas, After effects etc)

Needs:

1 HDD (or two in RAID 0) for a total of 1TB for source files (mostly read from here)
1 HDD (or two in RAID 0) as above for intermediate files (read and write, even in the same time, if the throughoutput is sustained)
1 or 2 HDD as backups of the two above.


Today:
Athlon FX 53
Motherboard with just SATA I (150) but with two raid SATA ports (VIA and Promise) plus IDE.
XP pro SP3

Tomorrow (I don't know when):
?
?


Which hard drives would fit in this scenario?

My considerations and concerns:

1 - SATA III not suitable because it's not switchable to SATA I. SATA II should

2 - the PC works quite frequently but the it'is in the main room of the house so heat and noise are a huge concern. But jerky playback is too...
By now I'm using two Seagate Barracuda 7200.10 80GB in RAID 0 as source drive. I would like to keep heat and noise at max as they are today.

I read the WD Black 1TB review here and other drives review around the net but, for now, I can't choose the right one(s).
It seems performance and heat&noise can't cope together.

Thank for listening.