Thanks for the suggestions. When I said 'without breaking the bank', I meant no more than $200-300. So this rules out buying a new pair of taller stands unfortunately.
I like the suggestion of creating a tilt, but I don't need to tilt just to find out if it makes a difference. I can slump on the couch a bit to get my ears a few inches lower than the proper sitting height. So the truth is that there's not a huge difference when I'm sitting upright or slump down a few inches. The main difference is that the music gets a tiny bit more immersive and the soundstage gets a bit taller when I lower my head. But I don't know if I can justify spending more than a few hundred dollars to get marginal improvements.
I do have the ability to raise or lower the footers, so that's something I'm going to try first. My only concern is stability.
@yogiboy -- thanks for the IcoAcoustics suggestion. I didn't think of that before, but this might be a reasonable solution if the tilt doesn't fix the issue.
What do you guys think of using thick butcher blocks underneath the speakers? I don't know how they impact the sound though. Probably a bad idea but who knows.