Actually I just like to go overkill a bit for expansion. Right now I'm using maybe like 5 amps, max. Later on if I end up having tons more stuff then I can safely plug it in.
Though I've rethought it and I'll drop the breaker idea. If I really want AFCI protection it's easier to just add in such breaker in the panel feeding the circuit. I also would want to separate my PDU in at least two circuits - one UPS protected, the other not which should be easy to do. One would plug into the surge portion of the UPS and the other in the UPS portion, so I'd get my surge protection that way. I'll probably still add GFCI just because it's a very easy step to do and will save from any potential ground faults like spilling a drink and it ends up on equipment, etc.
When I do eventually build this I'll probably add cable management into it as well.