upgrading a mostly 6 year old computer

[sound3]

currently I have a full size tower with a dodgy 4 1/2 year old Antec SP-400 PSU.
The momentary power switch in the case is usually faulty too.
MOBO: year 2006- Gigabyte GA-K8NSC-939 nForce3 250Gb chipset 1600 MHz HT Dual Channel DDR400 Socket 939 ATX Motherboard, CPU: AMD Athlon 64 X2 Dual Core CPU 4200+ 2.21 Ghz

1 GB RAM (2x512MB)

2 ATA WD 160 GB Harddrives. one is from 6 1/2 years old. one is 4 1/2 years old. both IDE.

Asus ATI Technologies Radeon 9600 SE 128 MB DRR2 Video Card, Chip clock speed 400 MHz from 2004.

Sony DVD-ROM DDU1612 drive (16x read and 40x CDROM read-speed) IDE w/ cache 512 KB from 2004.
Sony DVD-RW DW-U18A drive (12x DVD, 40x CD read speeds), Write Speed: 40x CD, 4x (DVD-R) IDE drive from 2004.
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I'd like to get a mid-tower case that fits under 16 1/4" height to fit within a piece of furniture if possible but not totally required. I'd like to have good ventilation but not as loud as my 4 80mm fans in my current case + PS fan +CPU fan.

I plan on using Windows 7 64-bit OS from day 1.
I will be upgrading Adobe Production Premium suite to CS5 which requires Phenom II. Mostly I'll use Photoshop and Adobe Audition digital audio editing software. Occasionally Adobe Premiere CS5 video editing and Encore DVD authoring for personal projects.
Daily use of surfing the Internet, email, invoicing with MS Word.
I do not play any games at all. I have no need to overclock my computer.

Motherboard: GIGABYTE GA-880GA-UD3H AM3 AMD 880G HDMI SATA 6Gb/s USB 3.0 ATX
Newegg.com - GIGABYTE GA-880GA-UD3H AM3 AMD 880G HDMI SATA 6Gb/s USB 3.0 ATX AMD Motherboard or Asus M4A89GTD PRO Socket AM3/ AMD 890GX/ SATA3&USB 3.0/ A&V&GbE/ ATX Motherboard - M4A89GTD PRO/USB3
sata3 and usb3 and since the AM3+ Mobos are not available yet I think this board will still be good for a few years.

CPU: Phenom II x4 or x6. I want one with 6MB L3 CPU cache. maybe
Phenom II X6 1075T (3.0GHz, 125W, 3MB total dedicated L2 cache, 6MB L3 cache, 4000MHz bus, socket AM3)
Not sure if I need 4core or 6core since I'm upgrading I figure I should get 6 core since it's all going 8,10,12 cores in the next few years.

CPU cooler: A Coolermaster Hyper 212+

RAM: 240-Pin DDR3 SDRAM 2x4GB = 8GB RAM. i've been recommended these:
Kingston, Crucial, Corsair, OCZ or Samsung brands.

GRAPHICS CARD: Adobe CS5 has certified GPU cards for GPU-accelerated Adobe Premiere Pro video editing
* GeForce GTX 285 (Windows and Mac OS)
* GeForce GTX 470 (Windows)
I don't plan on doing any HD video editing at all though and rarely do much video editing.
Perhaps I can get something less that is not certified as I don't do much video editing at all. Maybe a mid-range graphics card?

HDD: 1 500GB SATA 6Gbps 7200RPM 32MB buffer drive for OS & programs.
(Western Digital Caviar Blue WD5000AAKX 500G SATA3 7200rpm 32MB Hard Drive )

2 2TB drives in a RAID 1 configuration. I've never used a RAID but thought I could do it with Win7 OS RAID software controller. for video, photos, all FLAC & MP3 audio files. I have half a dozen external HDDs that I want to put all the content on these 2TB RAID drives to have access.

CASE: HEC 6C28BBX585 Black Steel ATX Mid Tower Computer Case 585W Power Supply
Newegg.com - HEC 6C28BBX585 Black Steel ATX Mid Tower Computer Case 585W Power Supply
Looks like I'd need more fans.

I only use the desktop at home plugged into a Ethernet cable so the motherboard's networking should be adequate.

The computer is in my bedroom and I also plan on getting a 22-24" LCD monitor which I could watch streaming Netflix, DVD or Blu-rays on.
Should I just get a new internal DVD-ROM or a BD-ROM drive since my current one is 6 1/2 years old and hours of use playing DVDs and audio CDs?

Should I get a new internal DVD-R drive to burn DVD-Rs faster?
Also concerned that Windows 7 drivers may not work with both old optical drives.

[glc]

The power supply in that HEC case is low quality. Stick with Corsair, Seasonic, or Antec PSU's.

Don't waste your money on 2 hard drives for RAID - use a good backup strategy instead.

Look for a low end workstation graphics card that's recommended for that software - a Quadro or a FirePro.