Building a NAS

Hi Guys

I am planning to build a NAS system(Actualy 2 but they will be identical-1 for general use and second for the backup of the first one).

as an OS i want to use FreeNAS instaled on a 256MB USBDrive.Now i have a few questions that i would like u guys to help me.

1. HDD-i was planning on the seagate 1.5TB drives.i know they have a bug BUT if i do the firmware update will that bug be eliminated?i want theese cause they are cheep in regard of they capacity and i need like 15 of them

2. PSU - i was thinking at 8 HDD in raid 5 for the general purpose NAS and 7 HDD for the backup in raid 0.How much of a power supply do i need?400-450W???

3. raid card/port multiplicator - i was thinking to get a raid with 2-4 ports(dunno yet wich one i still have to check what is suported on FreeNAS)(sugestions Maybe??) and multiply its ports with this http://www.lycom.com.tw/st176PC.htm.would this setup work? or would it be better to hook the multiplier to the MB Sata slots? i dot really care about speed.

4. CPU+MB - i have already GA-945-GCM motherboards with integrated graphic and 2 E2200 CPU wich i got almost free.i would say its more then enough and to that combo i add 2 or 4GB of ram.i accept suggestions if there is a better performance deal. this i going in 2 Thermaltake M9 Cases(9x5.25" slots wich get filled up with 3 of these http://addonics.com/products/raid_ [...] 35nsa.asp)

Speed - not that relevant cause it will only storage for a videoediting bussines(we assure the clients we keep theyre mowies for a period of 6 months.so after i finished working with the mowies i move them to the nas and stay there for 6 months then i delete them).

hopping u have suggestions and can help.apreciate all your trouble

P.S. - u can post links to parts but i cant promisse i will get them cause of availability in my country(Israel)
B.T.W. - is Newegg to israel?could not find thet on theyre Site

Thx

Newegg will not ship to your country unfortunately.

Optional Part: iStarUSA T-5-SA 1x5.25" Bay Trayless Anti-vibration SATA Mobile Rack - Retail $14.99. For images see here:

http://www.newegg.com/Product/Prod [...] USA%20T-5-

For Freenas I would use this. Has to be Ultra IDE. Regular IDE does not work.

Ultra IDE(40-pin) to Compact Flash Adapter

http://www.monoprice.com/products/ [...] 1&format=2

If you have trouble with Freenas, there is Openfiler also.