Specialized makes really good pumps, along with Topeka. I'm sure those Silica's are great but don't know if I really wont a pump that will last that long. The thing with my specialized is with the switch hitter pump head, the one that automatically switches between presta and schrader. It always lets a little air out of the tube, because the internals press the presta valve before the pump head is sealed around it. So the tube will have always leaked about 10psi everytime you pump it.