>>2429356Potable Aqua is my go-to. Purifies in 30 minutes or so, then just wait an extra 5 minutes for the neutralizer tabs to do their work and you’re good. I’ve never gotten any particularly bad taste from it either, since I always use the neutralizer tabs.
For filters I actually like the Survivor Filter, it’s a pump filter but it doesn’t cost a mint like a Katadyne. On the other hand it’s not as nice as a Katadyne, but still plenty good enough. I prefer it to squeeze filters because you can still get as much water as you need even if the source you’re dealing with is only an inch deep or whatever. Takes a while to filter a lot of water though.