If I am correct, the original version (with the white body) also had a plastic torso. That is, the white tube in the middle is also plastic, not aluminum.
Was there an all aluminum version? If so, I'm not aware of it. Thus, I believe this newer version is no leass durable than the original one.
Anyhow, I have three of the old white bodied version filters, which I believe is the original model. I always marvel at how precise and solid the pumping action is. Truly a quality product.
Because of how much heavier and bombproof this filter is, it is a great choice for a home survival kit, or situations where failure of your water filter is not an option.
If you're doing a 2 or 3 day hike, then a lighter but less durable model, like a Katadyn Hiker (PUR) or one of the MSR models, like the Sweetwater, would do you fine.