I want to pickup a spare headshell for my Mitsubishi LT-20. The readily available choices seem to be the Ortofon SH-4 ($30, 9.4g) and the Sumiko HS12 ($90, 11.4g), at least that's what I've seen posts on. Anyway, two questions: 1.) Should I expect that much difference for the extra $60 spent on the Sumiko? and 2.) My stock Mitsubishi headshell is listed at 6.2g. Is the extra mass of the Ortofon (+3.2g) or the Sumiko (+5.2g) anything to be concerned about? I'll be running a Soundsmith-rebuilt Grace F9-E if that makes a difference. Thanks for any advice.