pretty hard to experiment with height.
No it's not! It's quite simple, actually. Play around with stuff you already have around the house:
Stack some cinder blocks. Even if not on hand, will cost you a few bux at Home Depot. Very solid and effective sonically. I've actually used these as monitor stands -- spkrs sounded great on 'em. Paint them to better the look.
Plant stands.
Kitchen / dining chairs.
Bar stools.
Some simple wooden end tables (or any material, for that matter). In a pinch, I have used these as speaker (and gear) stands:
Adjust the height in small increments with books, bricks, blocks of wood, hockey pucks, etc. The height of the average kitchen / dining chair is 18 inches. Maybe a good starting point?
Use your imagination. Experiment and get a feel for things. When you find the height that works,
then commit to a pair of more expensive dedicated stands.
Think outside the box. Not only is it not brain surgery, it's not rocket science either!
Good luck in your experimentations. I'm sure they will sound absolutely superb, even if "off" by a few inches. I wouldn't sweat the small stuff.