OK I found out what the problem was and it turns out the only solutions I know of are to find a mod that I'm not even sure exists, or to buy a new T.V. or monitor (thankfully I have different ones I can use.)
It seems like Sins of a Solar Empire (and also, Supreme Commander has this issue too - when I launch the game it says "Unable to created Direct3D" when I use this T.V.) requires that you have a monitor that has resolutions with the ending being a MINIMUM of 768 pixels. (EX: 1024 x 768) - so if you have a monitor that goes up to 1400x900, it will still work with that resolution if you can also bring the res on the monitor down to [anything] x 768.
My T.V. is a 1080i LCD and it actually cannot get lower than 800 pixels, and cannot go higher than 720 pixels, so I cannot get any resolution to "768". I may try going to nVidia control panel and making a custom resolution, but for some reason I currently cannot get any resolution to 768, so using another monitor is my only known option.
Pretty weird oversight, how the heck did one of the most optimized and compatible games out there miss something as simple as resolution support? Yeah I can just use another monitor but man, SoaSE on a 40" screen sounds way more appealing.