I am currently using an inexpensive plastic immersion blender because it's safe to use on cast iron and enamel cookware. I would love to upgrade to a sturdier metal model, but I am unwilling to get new cookware (I REALLY like my pots). I just saw a Calphalon model that has a removable guard so the shaft won't hurt my pans. Do any of you know of other models that have a plastic or silicone guard for protecting cookware? And, has anyone tried the Calphalon immersion blender?