Actually, thinking a dual proc nehalem xeon machine for my next upgrade. Would do it soon, but $1800 is a bit much to justify right now.
The bulb is based on a full sphere 800-m radius reactor. Based on my playing around with secondary reactors and volume scaling from the ISD, I reckon this ship would be putting out firepower in the 400-500 ISD range. Open question if that's really justifiable, but this is the Empire we're talking about, and at least it's much more efficient about it than an Executor matching 120x ISDs. I'm thinking it's probably overkill - I mean would you really need all that many Executor-killers? (though, I suppose that'd be useful for strategic formations to have when Moffs have an SSD as flagship...) Will have very little in the way of hangars, maybe double the Bellator layout on the ventral side. Some mild cityscape cortex on the top of the center spine, but mostly armor, with some interstitial terrace (which just happen to be a large area at this scale, all the same)
As for really enormous guns, considering there are tactical superlasers and planetary massive defense installations it's not inconceivable, but it's probably too much of a maintenance nightmare to turret mount really large guns on most ships. That and the recoil bracing you'd need, and the need to engage many targets. Ends up being more efficient to spread the firepower across smaller guns. Probably like Hitler wanting to arm the H-class battleships with 80-cm siege guns; you
could do it, but it's much better to spread out the resources differently.
Comparable volume to an SSD, but more compact, with more armor.
Battery group of 15x twin 720s.
I'll probably keep plugging away once in a while at parts of this, and then mothball it when it gets too large and concentrate on other things until I upgrade my machine.
@Justicar: I don't really have any experience with prototyping meshes, but feel free to PM me with more details if you like.