Having never built or run a server I have little to contribute. Having reserched the crap out of power supplies, I do have this though... Dump the Logisys PSU. Your PSU is not the place to cut corners since the rest of your machine is dependant on it producing clean, reliable power.
Here's why I say dump it, 1) It is being sold as a 575W PSU but can only sustain 450W. It has a max output of 575 - if the rails are loaded right and that may not be for more than a few seconds. 2) It's way heavy on the lesser rails which is old design. 3) I can find no legitimate reviews for that unit (or any Logisys PSU) and that in itself signals a red flag to me.
I will suggest this unit for a 24hr operating computer; Rosewill CAPSTONE Series CAPSTONE-450 http://www.newegg.com/Product/Product.aspx?Item=N82E16817182066
even though it has less rated wattage, it is heavier on the 12v rail (37A vs 25a) and gets a high rating from AnandTech found here (linked to the conclusion page)http://www.anandtech.com/show/5698/rosewill-capstone-450w-and-650w-80plus-gold/6
Hope it's of some help