Hard Drive: Western Digital 1 TB WD Blue SATA III 7200 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive
CASE: Cooler Master Storm Enforcer Gaming Mid Tower Computer Case with USB 3.0 Ports (SGC-1000-KWN1)
OPTICAL DRIVE: Asus 24xDVD-RW Serial ATA Internal OEM Drive DRW-24B1ST
The folks down at CompUSA recommended a SSD...but I don't like low storage space.
I'm also getting Windows 7..going half on it with someone after I get the stuff but...just asking if these are compatible yet
I'm not a computer wiz but this is something I have always wanted to do, rather than constantly buying computers...plus I tried to increase my Gateway DX4300-11...not so good... I already have the PSU and the GPU...
Since you already have the PSU, I won't recommend swapping it out.
You should really consider getting an SSD, however, since you can always use a larger HDD for storage. This is what I personally do (and many others) to give you the best of both worlds.
Using an HDD as storage wouldn't effect performance of data stored on it since you're only doing one thing at a time from the HDD; your SSD can concentrate on your OS and other misc programs you install on it.