+1 on the HRS
One function of a weight is to secure the record to the platter in lieu of a mat, which in my case is bare Delrin (mats are not ubiquitous).
Another function is to deal with vibration/resonance generated by the stylus. The HRS utilizes a polymer interface between the record, spindle and weight to deal with this which I found to be a noticeable benefit when compared to others I had tried which all used a cheap felt pad.
Lastly I use the light version which is 315g vs 850g for the Heavy which "is specifically designed to be used with mid to high mass turntable designs (approximately 15 lb. platter and higher)".
I hope that helps.