We did a bunch of research too because the bottled stuff was adding up and I didn't like that plastic taste from the leaching bottles.
We live in an apt, so we didn't want a permanent solution that would be a huge investment. We did decide on reverse osmosis however, so rather than putting a $500 system in, we bought the high-quality reusable bottles (which are not supposed to leach, but it is controversial, they may a little?) from our co-op and use their wonderful reverse osmosis machine. We have a three gallon with a spout that goes into the fridge and a five gallon which sits on the counter tiped into a terra cotta dispensor (for cooking, refilling the cold water). The taste is so extraordinary over even bottled stuff that besides the soy milk, this is all we drink around the house (perpetual glass aside the computer monitor).