only think you need to look is just network (lan) connection port since you want to do network
as you have money, why not pay more to get a 17" good quality LCD monitor.
If you do a lot of Excel, get two 15" slim LCD monitor is even better, but make sure graphics card support two monitors
set your budget and then ask Novatech to give you as much as they can
if you want peace and quiet, Novatech has some good component and case to make very quiet PC
maybe select your component and ask Novatech to build and warrenty for you