I would go with AM2 Nforce 570 Ultra chipset because it has 6 RAIDed SATA, 2 Gb LAN, on-board video.
By the way, Asus M2N-E board is based on exactly that Nforce 570 Ultra chipset. However, I would go with this MSI board:
K9N Platinum
6 RAIDed SATA connectors,
2 x GB LAN
Onboard video
No fans
Plus, my personal experience with MSI GeForce 6150 board is good.
Asus board - it has an extra fan, and it has a heatpipe. Since you are NOT OCing your file server, and your target CPU is probaly Semptron, you do NOT need an extra fan and heatpipe.
Other things should be the same because that Asus board is based on exactly the same chipset as MSI board. However, I did not look into Asus board specs.
MSI Specs:
? 11.96 in.(L) x 9.61 in.(W); ATX
? 4 DIMMs w/ DDR 800+ up to 8GB
? 2 PCI-E 16X (2nd PCI-E 16X slot runs 1X speed); 2 PCI-E X1; 3 PCI; 10 USB
? Realtek 7.1 CH HD audio
? Dual Gb LAN; IEEE 1394 RAID(0, 1, 0+1 & 5); SATA2; ATA133
? Live Update; Dual Corecell; MSI Dual CoreCenter; DOT , DigiCell; nVidia Firewall
CPU
? Supports 64-bit AMD® Athlon? 64 / Athlon 64FX / Athlon 64 X2 processor (Socket AM2)
? Supports Athlon 64 CPU: 3500+, 3800+
? Supports Athlon 64FX CPU: FX-62
? Supports Athlon 64 X2 CPU: 3800+, 4000+, 4200, 4400+, 4600+, 4800+, 5000+, 5200+
Chipset
? NVIDIA ® nForce 570 Ultra Chipset
- HyperTransport link to the AMD Athlon 64/Athlon 64FX/Athlon 64 X2 CPU
- Supports 1 PCI Express x16 interface / 3 PCI Express x 1 connection
- Independent SATAII controllers, for six drives
- Single Fast ATA-133 IDE controller
Main Memory
? Supports dual channel DDR2 533/667/800, using four 240-pin DDR2 DIMMs.
? Supports the memory size up to 8GB
? Supports 1.8v DDR2 SDRAM DIMM
Slots
? Two PCI Express X16 slot (supports PCI Express Bus specification v1.0a compliant)
? 2nd PCI Express X16 is compatible with PCI Express x 1 (MSI PCI-Express Lite Slot)
? Two PCI Express X1 slot
? Three 32-bit Master PCI Bus slots, one orange slot reserves as communication slot.
? Support 3.3V/5V PCI bus Interface
On-Board IDE/SATA
? An IDE controller on the nVIDIA nForce 570 Ultra chipset provides IDE HDD/CD-ROM with PIO, Bus Master and Ultra DMA133/100/66 operation modes.
- Can connect up to 2 IDE devices
? NV RAID supports 6 SATA II ports (SATA1-6). Transfer rate is up to 300MB/s.
? NV RAID (Software)
- Supports up to 6 SATA
- RAID 0 or 1, 0+1, 5, JBOD is supported
- RAID function work w/ SATAII HDDs
BIOS
? The mainboard BIOS provides "Plug & Play" BIOS which detects the peripheral devices and expansion cards of the board automatically.
? The mainboard provides a Desktop Management Interface (DMI) function which records your mainboard specifications.
? Supports boot from LAN, USB Device 1.1 & 2.0 and SATA HDD
Audio
? Chip integrated by Realtek ALC883
- Flexible 8-channel audio with jack sensing
- Compliant with Azalia 1.0 spec
LAN
? Supports dual LAN jacks
- Dual LAN supports 10/100/1000 Fast Ethernet by nForce 570 Ultra
IEEE1394
? VIA 6307 chipset
- Supports up to 2 x 1394 ports
- Transfer rate is up to 400Mbps
On-Board Peripherals
- 1 floppy port supports 1 FDD with 360K, 720K, 1.2M, 1.44M and 2.88Mbytes
- 1 serial port
- 1 parallel port supports SPP/EPP/ECP mode
- 1 audio jack (5-in-1), coaxial/fibre SPDIF out
- 10 USB 2.0 ports (Rear x 4 / Front x 6)
- 2 RJ45 LAN jack
- 1 D-Bracket 2 pinheader
- 2 IEEE 1394 a connectors (Rear x 1/ Front x 1)
- 1 CD-in pinheader
- 1 IrDA pinheader
Dimension
11.96 in (L) x 9.61 in(W) ATX Form Factor
Mounting
9 mounting holes