You won't go wrong with a Zefal. I'm not sure why Silca Impero pumps cost so much. I have 3 of them bought in the 1980s and every one of them has self destructed within five years. It was either the pump head that cracked or, on one pump, the body that the head attaches to cracked. Perhaps they've improved since then, but they would have to pump themselves for me to spend that much money. Some folks equate price with quality and the market exploits this.