there is a thread here about steel vs alum. Its the bike more than the material. I have what they call an alpha alum frame and it weighs about 30 lbs to start. There are steel frames out there that weigh 8 lbs. A hybrid like yours or a commuter like mine will weigh more than a road bike. Beyond that - I believe its a personal thing like shoes or shorts. Its gotta fit You and work for You or it won't matter much what it weighs. Your LBS should let you take some out and ride around on them and they Should fit you to the bike. Have fun - and know I"m jealous. My first "comeback" bike was a commuter bike and I LOVE it - but wish now I Had bought that road bike - coz I LOVE to go fast! 
BTW: born and raised in Comstock, Mi - right there on the outskirts of Kalamazoo. Still have relatives living there.
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"