@height8 I didn't mean to imply that you were striving for it, it was just an observation compared to my situation :) There is no upgrade from the Aeropress, realistically, short of spending 5k. I'd suggest the Kalita Wave as an easy-to-learn style though — it produces a pretty unique brew and is forgiving, though you'll also need a gooseneck kettle if you don't already have one.
That aside, I can only recommend varying your choice of beans. In fact I might recommend it more than looking for other devices to play with. Look for single-origin or single-plantation beans, light roast — that's the only way to keep the characteristics of the varietal and the origin intact. Though your aversion to acidity is a limiting factor.
What grinder are you currently using?
// @indigo