I full agree with you there, but the big question is will it give you the same quality of work just not as fast?? I, too, don't really care about the speed but more for the quality and if I spend $600, it better be an A1 job.
Something else to note, is the Mytee and Century both have a suction of 120", whereas the smaller ones are rated at 102" yet the review stated that they didn't have much suction power at all. Well, correct me if I'm wrong but won't the suction power dictate how much crud the machine will be able to *pull* out of the carpet? If this is so, then if the small machines are lacking in suction, the rest really doesn't matter anymore.