Hello Jason, welcome!
Three things can improve the sound of a system in a room:
1. Getting the speakers and listening chair in optimum positions.
2. Room treatment.
3. Careful use of an equaliser, if you dare!
1. If you are free to move your speakers and chair around you can reduce in particular bass problems. I use this method, but there are others:
http://www.barrydiamentaudio.com/monitoring.htmHow free are you to move your chair and speakers around? In order to check you've got it right you can use your ears and music or test tones, your ears and a sound pressure level (SPL) meter with test tones, or best and most sophisticated, a measuring programme such as Room EQ Wizard, which requires a laptop, microphone and stand and lots of learning.
2. Frankly the best place to get advice on room treatment would be to contact a supplier. GIK and Real Traps are such people:
http://www.gikacoustics.com/http://realtraps.com/Both should give you free advice in the hope of sales. I've used GIK and found them helpful.
Bass traps will be key and they are quite large and a bit unsightly for a living room. Usually bass traps are placed in corners where the sound pressure seems to build up.
To deal with glass you could use panels on feet so they can be moved away when not in use.
Regarding your room layout, you certainly have some good space to play with. Having nothing behind your listening position is a good thing as you won't get reflections from there. The cove on the left of the left speaker is problematic as it's best to have symmetry for both speakers. Bass will behave differently in each corner, not just wall/wall corners but wall ceiling corners too. I'm not sure what to do about that. You will also get reflections off the right wall but not off the left. By using absorbent panels on the right wall that may balance things.
Some people also have problems with floor and ceiling reflections with the mid and high frequencies. That depends on how your speakers spread the sound. You could ask Tylers about that. Usually a carpet on the floor will help, and panels on the ceiling (you should try and test if ceiling reflections are an issue as putting panels on the ceiling may be difficult).
Well, that's you starter. There's a lot to it. It took me a few years to learn and complete what I wanted to do. Take your time, experiment, and of course, enjoy your music!