After a lot more reading and contemplation on this subject, I want to throw another option out there for what i'm thinking for some feedback. This is similar to what a lot of folks are doing with duel (Or quad) sealed JBL's powered off an iNuke/NX amp.
Here's my thought for my small office.
1x - NX3000D
2x - 1.5f cu ft sealed Separate enclosures (Later possibly expand to 4 separate singles) placed on opposing walls, and possibly later on all four walls/corners of the room if needed. Amazon link to box
Add some polyfill, wire it up, and adjust the EQ to boost the 20hz range (This is what I understand is being done from reading). And call her good. No need to build anything unless I want nicer enclosures or want to go ported. I can test this concept out for pretty cheap, and have a NX3000D to expand with if I want more later on.
I already own an NX6000D that's going into my HT with two UM18's in Full Marty's. Those parts are just sitting waiting for me to get spare time to work on it, so a more plug and play setup sounds appealing as my time is limited. I had thought I wanted to use a plate amp for simplicity of having one of these subs be more portable, but decided it was ultimately not worth the limitation if one sub wasn't enough, plus the added work of building a box with a cutout for the plate amp.
So what do you guys think, can I start with powering only two of these 12's on a NX3000D? I don't know how I'm going to wire that. I've read the NX1000D just doesn't have enough power for sealed subs to be EQ'd down low like that. I like the idea of having single 12's in each corner for even
coverage to start with. Again, my room is 10x10x11 with two open doorways into the rest of the house floor plan.
EDIT: Also, I have a Dayton Omnimic and REW to play with this along with the built in DSP in the amp. Given, I'm a total noob and will be learning all the way.