@macg19 Thanks for your thoughts. As close as I've been able to come to auditioning the HRS weights are the MoFi versions that were developed for them by or in conjunction with HRS. Right now I have the Pure Fidelity SS-10 record stabilizer (which is the weight on my other deck, a Pure Fidelity Harmony) coming in at 765 grams, the MoFi Super Heavyweight (ironically not really the heaviest that they have) coming in at 367 grams, and a Furetech Monza coming in at about 350 grams.
The Furutech is probably the techiest and is a combination of stainless steel, carbon fiber, and a piezoelectric damping material. It seems to add some better instrument delineation and space without changing too much of the Technics sound. I like this one best with something well recorded, It adds in the right places without being too much. The Pure Fidelity SP-10 adds more heft to the proceedings, again without robbing the table of its basic nature. I think a lot of folks would like this weight the best of the three. I like it best with records that are not that well recorded (think current indie records), where the added heft is very welcome and helps balance what would be the harsher edges. The MoFi somewhat splits the difference and gives up some detail for a smoother sound. With the Technics, I feel it gets too far away from the basic strengths of the TT and is a little too polite for my tastes.
It's been an interesting exercise so far, I hope to try a few more before I'm done.