What about a flat-lidded trunk? (Like a blanket trunk)
That would sit nice and low for you, and should be sturdy enough to handle the weight. Or a low coffee table.
If you have one locally, check out thrift stores, sometimes they've got decent furniture for outstanding prices. (Other times it's just junk...and it really depends on where you live, I know the one closest to me always has crap, but if I go into Oak Ridge, I can find some really high-quality stuff.)