Originally Posted by colinflteng
I agree with metal bowl if you can get it, but then you loose the ability to see if any water is in the bowl
Not quite correct.
The metal heat shield is an addition to, and does not replace, the see-through plastic bowl. You can still see the bottom of the unit to know if you've got water or nasties down there.
Bummer that you don't have room for the 500 -- they're great filters.