My NAS setup is two Unraid servers. Both are based on Antec cases.
MediaServer1:
This server is based on an EP35-DS3R mobo. This mobo has 8 sata ports onboard, with 2 being J-Micron.
Unraid
EP35-DS3R
intel Core 2 Duo e4500
1 (for now) x 1GB DDR2 667 memory (Kingston)
Antec Twelve Hundred
Antec 620 Neo
Supermicro AOC-SASLP-MV8
ATI 7500 PCI GPU
COOLER MASTER GeminII
Cooler Master 4 in 3
Scythe SCY-HDSX4 Hard Disk Stabilizer x 3
OCZ Diesel 16GB USB Drive
1 x Seagate Barracuda XT (parity)
1 x 1.5TB WD Green (EADS)
1 x 1.5TB WD Green (EARS)
1 x 1.5TB Samsung EcoGreen
1 x 2TB WD Green (EARS)
1 x 2TB 7200RPM Hitachi
1 x 2TB 5950?RPM Hitachi
I built this server second. I credit other builds here for the suggestions for most of the parts. Each bay is a different kind of HD to 100% take advantage of Unraid's amazing mix and match ability and I hope to keep it that way. I have a 2TB 5900RPM Seagate that is going in as soon as I get the firmware straight.
MediaServer2:
This server is based on a P35-DS3L mobo. Honestly this is an odd mobo to use for Unraid as it only has 4 onboard sata ports, but I had it left over from a previous Hackintosh build so I wanted to not waste it.
Unraid
P35-DS3L
Intel Pentium e2140
2 x 1GB DDR2 667 memory (Kingston)
Antec Three Hundred
Antec 420 Neo
3x Sil 3132 cards
Nvidia Fanless 7300 GS GPU
Scythe Mini Ninja Fanless CPU heatsink
Cooler Master 4 in 3
San Disk Cruser 2GB USB Drive
9 x 1.5TB 7200.11 Seagate drives (yes THOSE drives)
1 x 1TB Western Digital Black
I am using the second to most recent bios (F8) to avoid HPA problems. I am using the six internal 3.5inch bays, plus a Cooler Master 4 in 3 in the top bays for a total of ten drives. All the drives in the server will be the infamous 1.5TB 7200RPM Seagate drives, except for one that is a 1TB WD Black (that I basically got for free so why not use it?). Average temps are 27-30, but it gets up to a top of 35 when copying over data.
My favorite part about this build is that because I am using a fanless CPU HSF and GPU, it is pretty quiet. Everything is Antec where possible (I am kinda nutty loyal to them), but because the built in drive trays lacked any sort of vibration management I used rubber washers to secure the drives. This server holds only movies for me.