Looking to 10-15 box, need some input on my specs!

[MiRai]

Currently I plan on doing about 15 boxs to kill some dragons in World of Warcraft.

My specs right now are looking to be:

Intel Core i7-3930K 3.2GHz 6-Core Processor

Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler

Asus P9X79 LE ATX LGA2011 Motherboard

Corsair XMS 32GB (4 x 8GB) DDR3-1333 Memory

EVGA GeForce GTX 680 4GB Video Card

I would swap the Corsair XMS for some G.Skill X-Series @ 1600 (matches the motherboard color scheme better anyway >_>).

Also, if you're not buying these parts within the next week, keep your eye out for the 4GB model of the GTX 770 when it becomes available. If you haven't purchased the GTX 680 4GB by then, the GTX 770 will be a better option (as long as it is the 4GB model).

What does the storage situation look like in this build? SSD?

Now if it cannot, how many can this PC run?

This is entirely dependent on how fancy you want your graphics to look in each client; but you should have no issues running 15 somewhere around medium-ish settings depending on how much you want to fine tune it.

Anyway with that KVM switch would it be possible to just throw 10 boxes on the main PC and 5 on the laptop then just hook them together and configure with ISboxer?

Yes... And no need for a physical switch anymore these days, just go download Input Director on each machine and configure it.