Database and Web Server build

I am planning to make 2 servers, one dedicated to a MySQL server and another for other servers such as Apache Web Server. I was planning to make a build, both consisting of these parts (I know, should've used PCPartPicker, but some of the parts weren't on there):

CPU: Intel Xeon E3-1275V2
Motherboard: Supermicro MBD-X9SCM-F-O (MicroATX)
RAM: Kingston 4x8GB ECC DDR3-1333 RAM (KVR13R9D4K4/32)
HDD (Data): 2 of Western Digital RE4 1TB (WD1003FBYX) in RAID1
SSD (Boot/Software): 2 of Crucial m4 128GB in RAID1
Chassis: Norco RPC-231
Power Supply: Antec BP430
RAID Card: HighPoint RocketRAID 2710

So here are a few questions:
- What's a good REDUNDANT ATX-sized power supply somewhere between 350w-450w?
- I have a feeling that some of the parts here will bottleneck, will they?
- What would be an ideal internet speed for the servers combined? The internet will be shared with around 8, or maybe a few more around an office.

Notes:
- This is for my dad's company which is rather small, and he wanted a server that could store his resort's residents' payment information, so it doesn't have to be anything serious.

Thanks in advance!