For two rows of seating, it is going to get complicated. Have you worked out how high the rear row needs to be to see over the front row. Likely during the movie people are going to slouch down and relax, so you have to take that into consideration. And you are likely going to have to choose Front seats that are not high back. If you do, then the row behind has to be that much higher.
Can you tell us how high the ceilings are in the room? With a standard 8ft ceiling, about the highest you can raise the rear seating is about 1 or 2 feet. And you have to consider getting onto and off of this riser. And you have to have some protection to make sure people don't fall off the riser.
One way to overcome the need for a high riser is to mount the TV up higher. But if the TV is too high, those in the front row will always be looking up. If to low, those in the back row won't be able to see the bottom of the screen. Again, I emphasize that a Home Cinema room has to be looked at as a system. Every decision is going to effect the other decisions that have to be made.
If we assume the screen will have a 16:9 aspect ratio, then a 100 inch diagonal screen is about 49 inches high x 87 inches wide (unless my math is wrong)
. Unless I'm mistaken the screen would be 7.25 feet wide and 4ft 1 inch high. That leaves 5.25 feet or 2.625 feet on each side of the screen. That is the space on each side that you have available to place speakers. Remembering that the speakers can not be shoved into the corners, and you have to have space for one or more Subwoofer. Though if you do not place the equipment stand in the front of the room, then you will have plenty of room for the Front, Sub(s) and Center.
Just as a point of reference, here are the Klipsch On-Wall speakers
I was talking about -
I'm not saying buy them, I'm simply saying this is what this option looks like. I'm not even sure the speakers are still available, I just remembered seeing a photo of them somewhere. But it illustrates a possibility even if you don't pick these exact speakers.
Also here are some similar speaker from PARADIGM
, though a bit on the expensive side -
Likely that back raised tier of seating is going to need to be about 4 feet deep. A quick measure of my Sofa indicates it is about 3 feet deep, and you will need room to walk in front of the seating to actually get to the raised seating. Between the two we have eaten about 7ft to 8ft of the room. That leaves about 11ft to 12ft available in a 19ft room. If we put 2/3rds in front and 1/3rd in back, then that is 8ft in front between the front wall and the first row of seating, and 4ft behind the back row of seating on the assumption that is can not be placed back against the rear wall.
So, is an 8ft seating distance (roughly...more or less)
going to be adequate for a 100" diagonal screen? You'll have to work that out. There are calculators on line for most of these aspects of Home Theater because they come up in ever Home Theater install.
Using my own calculations, I estimate (assuming my math is right)
that at 8ft viewing distance, with a 100" Diagonal screen (87" horizontal). The viewing angle is about ±25°. Which sounds OK ...assuming...
my math is right.
So, now we come to the Emotiva T2 Floorstanding Speakers -
Great speakers I'm sure, but the question isn't are the great, the question is ... Will they work in your room?
So the speakers will be about 8ft from the listener and about 8 to 9 feet apart. Is that distance adequate for Floorstanding Speakers? You will have to work that out.
In my installation with a room 16ft wide (and some other complicating factors)
my speakers are placed about 5 ft wide with about an 11ft listening distance. That is a bit too narrow, and at 11ft fine, but a bit too close, not by much though. But then I have a regular 42" TV between them.
Again, you can see how each choice effects all the other choices.
You have to lay this out very carefully before you start buying equipment. As some else suggested, you might start with working out the type of seating, the location, and how much space that is going to take. Then once that is worked out determine the Screen and Speaker size based on that.
This is not really my area of expertise, I'm just working through what I think I would have to work through if I were in a similar situation.
For what it is worth.