Want a good room? Most Tx look gross and do little. They are expensive. Also, tx stuck on the wall don't do much. They have to be suspended from the wall. Oh, no body told you that, huh.
First, use your brain. How many reflections do youi want left. Do you want to listen to your system or your room. That's what I thought. Take your room out of the picture. Get Eco-core 2x4 panels (the best) and make 4x8 from them. Mount them on 4x8 x1" foam insulation panels from Home Depot. Cover with your preference. Suspend them from the ceiling 4-6" from every wall. If you don't have line array speakers, do the ceiling also. Carpet the floor. Even dirt sounds better than wood or tile. Get some sono-tubes for tube traps. Stick them in the corners and tune for the frequency that is bad for your room.
And if you loose your dog, ask yourself why he always goes in that room to sleep.