One thing about the standard Katadyne filters such as the hiker or hiker pro is I found that in a durability sense the hiker is superior because the hiker pro is built with a detachable outlet hose system but after a very light drop that valve stem broke and I was unable to repair it in the field so I threw it away. The hiker version does not have this so it is less likely to break on you.
That being said I think the Katadyne Hiker is a decent filter and comes in at about 11 ounces.
The best thing about having a pump filter is it allows you to get water from small trickles that you other wise would not be able to fill a bottle with.
