That lovely table with the six chairs is more of a problem than anything you're mentioning when it comes to the quality of your sound. Move that table and your ears will let you know what you are and have been missing.
Ronboco, has it right!
Peace!
Adjusting for Tweeter height with monitors
This may be a dumb question but how do you guys go about making sure your ears and tweeters are properly aligned? After all, stands only come in a few sizes. Do you use height-adjustable chairs?
I have to raise my Silverline monitors high enough to ensure the woofers clear obstructing furniture and in so doing, the tweeters end up about 4 inches higher than ear-level, when seated, which has a negative sonic effect. Rising up out of my chair a few inches, the sound is much better. My wife has volunteered to make me a tall seat cushion to compensate but this makes me wonder how others approach this.