And the hot swap power supply is also nice.
It won't be "hot swap" PSU. Yes, probably one could change it while it is still hot, but not without turning the device off.
(Such a thing is possible only with at least two PSUs working in parallel.)
I understand but the design is "Hot Swap" but now that you mention it....is the X-3 going to have redundent PSUs? Hot Swap? or at least swap-able?