New Build - Fairly Basic - Need Help

[antem]

Sorry for the lack of active newegg links - NOOB here for html and builds.

Here's my ? - I have an old IBM P4 2 ghz in a closet that is my storage / home automation / whole house audio server. Tired of the "Running out of Virtual Memory" warning and lockups on spyware and virus scans.

I'm thinking that I can use the same case (horizontal in a rack - Lenovo I now recall). Maybe same PSU (not sure what power but maybe OK with the 65W processor below). I'm willing to spend a bit on Mobo / Pro to possibly upgrade case / PSU / video later.

I have an old Dell box from 95 downstairs that I think I can NAS later. So, here's my plan - please advise:

Buy a 1 tb drive + enclosure -> backup "server"; teardown and install components below; install Vista home (I have a copy that didn't work on my old HP laptop); move P4 3 ghz mobo / pro from "server" to box downstairs; buy 2 more 1 tb drives for RAID 5 NAS.

Next Spring, build full I7 / Vista 64 desktop to replace old HP office laptop so I can play games and generally have a faster / more up to date computer.

I have a DVD and DVD burner drive that are OK in the server - I think I can fit everything (especially with that small video card) in the existing case. See any concerns? (Should I just get a new case (like a CM690) now -> but then do I aso have to get PSU and opticals?).

I appreciate any help and comments - especially compatability concerns for the major parts below.

Nate

Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
Item #: N82E16822136284

ASUS EAH3450/DI/256M Radeon HD 3450 256MB 64-bit GDDR2 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Low Profile Video Card - Retail
Item #: N82E16814121259

ZEROtherm ZT100 thermal grease - Retail
Item #: N82E16835887010

Thermaltake BlacX ST0005U External Hard Drive SATA Enclosure Docking Station 2.5” & 3.5” USB 2.0 & eSATA - Retail
Item #: N82E16817153071

CORSAIR DOMINATOR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model TWIN2X4096-8500C5D - Retail

Intel Core 2 Duo E8400 Wolfdale 3.0GHz LGA 775 65W Dual-Core Processor Model BX80570E8400 - Retail
Item #: N82E16819115037

ASUS P5Q Pro LGA 775 Intel P45 ATX Intel Motherboard - Retail
Item #: N82E16813131299

[not important]

I would suggest NOT cutting corners on the PSU. If there is any doubt about it's ability/reliability replace it before you install new hardware.

[antem]

Gotcha - would you recommend just buying a new case then and reuse the optical drives? I could probably use better cooling anyway. Would like it to be on my rack (horizontal) but it can sit on the floor if something like the Cool Master or Antec would be better for the money.

Thanks