Noticed you have 4 hard drives. Are you going to do a RAID 10?
My only suggestion would be to push your CPU to an E6600 or higher. The E6400 only has 2MB of cache or 1 MB for each CPU thread. The E6600 and higher have 4MB cache, giving you 2MB for each CPU thread.
The other thing is the chassis. It doesn't look like it will cool very well. It only has one chassis fan in the back and some sort of CPU tunnel that will get in the way of air flow. Personnally, I always look for a chassis that will have at least 3 chassis fans and one of them being a side fan to blow directly onto the CPU.
Just my 2 cents.