Wurger, curious as to why you have bought so many different brands? I try to find something that works and stick with it (perhaps varying quality between 'normal' and 'beater' classes). Did you have in mind this sort of comparative exercise? We have definitely benefited enormously from it, as it is rare to have such side-by-side comparisons (with such well-researched and well-observed details as you have provided).
9/26/13 at 3:08am