Here is my not-so-brief history and opinions on the arms I've used on my HW-19/III. Maybe too long and detailed, but here it is....
I used (and still own) a HW-19/III. Loved it. During its use as my primary table, I used a Grace 707, a Linn Basik LVX, a Premier FT3 (with and without Sumiko arm wrap) and a Jelco SA-750D.
My opinions of those arms....
The Grace was good with high compliance carts. A bit of ringing, but stable and easy to use. Not a good match for low compliance carts. At all.
The Linn Basik LVX was never better than "OK" and eventually lost the rubber isolator / buffer in the counterweight. Used with Audioquest 404 and AT OC9/ML. It was a better match to lower compliance carts than the Grace. (This is a Jelco-built arm.)
The Premier FT-3 was initially good and noticeably improved with the addition of the Sumiko arm wrap (from the Sumiko Analog Survival Kit). Used with Audioquest 404 and AT OC9/ML with very good results. The arm wrap made a significant difference. Not sure if it was the additional mass or arm tube damping. (This is a Jelco-built arm.)
The Jelco SA-750D is in a different league than the above arms. It was used without modification with an OC9/ML, Lyra Clavis DC and OC9/II. Very good performer and hands-down winner against the other arms I used on my HW-19/III in my system with these carts. The SA-750D was good enough to move to a modified VPI TNT with really good results.
Set-up and adjustment for the three "Jelco" arms was generally similar with a few exceptions on VTA adjustment; somewhat inhibited on the Linn due to the loss of the rubber counterweight isolator.
My opinionated general suggestion for this line of tables....
MY PERSONAL SUGGESTION (IF THIS TABLE IS NOT ALREADY SO MODIFIED) IS TO REMOVE THE SPRINGS AND USE SORBOTHANE PUCKS OR (MUCH BETTER) VIBRAPOD CONES (POINT UP TO THE PLINTH). That will help stabilize the plinth better keep the table in level adjustment. It will noticeably improve OVERALL performance of a HW-19 regardless of whether it is a /I, a /II, /III or /IV.
I won't discuss my VERY NEGATIVE opinions on Rega arms except to say they will never appear on any piece of operational equipment in my system.
As ALWAYS, these opinions are only opinions based on my personal experience.
YMMV. YRMV.
I used (and still own) a HW-19/III. Loved it. During its use as my primary table, I used a Grace 707, a Linn Basik LVX, a Premier FT3 (with and without Sumiko arm wrap) and a Jelco SA-750D.
My opinions of those arms....
The Grace was good with high compliance carts. A bit of ringing, but stable and easy to use. Not a good match for low compliance carts. At all.
The Linn Basik LVX was never better than "OK" and eventually lost the rubber isolator / buffer in the counterweight. Used with Audioquest 404 and AT OC9/ML. It was a better match to lower compliance carts than the Grace. (This is a Jelco-built arm.)
The Premier FT-3 was initially good and noticeably improved with the addition of the Sumiko arm wrap (from the Sumiko Analog Survival Kit). Used with Audioquest 404 and AT OC9/ML with very good results. The arm wrap made a significant difference. Not sure if it was the additional mass or arm tube damping. (This is a Jelco-built arm.)
The Jelco SA-750D is in a different league than the above arms. It was used without modification with an OC9/ML, Lyra Clavis DC and OC9/II. Very good performer and hands-down winner against the other arms I used on my HW-19/III in my system with these carts. The SA-750D was good enough to move to a modified VPI TNT with really good results.
Set-up and adjustment for the three "Jelco" arms was generally similar with a few exceptions on VTA adjustment; somewhat inhibited on the Linn due to the loss of the rubber counterweight isolator.
My opinionated general suggestion for this line of tables....
MY PERSONAL SUGGESTION (IF THIS TABLE IS NOT ALREADY SO MODIFIED) IS TO REMOVE THE SPRINGS AND USE SORBOTHANE PUCKS OR (MUCH BETTER) VIBRAPOD CONES (POINT UP TO THE PLINTH). That will help stabilize the plinth better keep the table in level adjustment. It will noticeably improve OVERALL performance of a HW-19 regardless of whether it is a /I, a /II, /III or /IV.
I won't discuss my VERY NEGATIVE opinions on Rega arms except to say they will never appear on any piece of operational equipment in my system.
As ALWAYS, these opinions are only opinions based on my personal experience.
YMMV. YRMV.