I've been using this Aquamira
filter for two years and have liked it. The lid broke off but other than that I've been happy. The filter is around $10. I only looked on Amazon, but it looks like they may have redesigned it.
Before it I had a Katadyn bottle. Even new out of the package it was slower to filter than the Aquamira and the replacement filters cost almost as much as the bottle/filter was new.
Those Sawyer bottles look interesting. I didn't look into the replacement parts costs, but the initial cost is in line with the others at $36.