SDS or phono stage


I have a VPI Scoutmaster with Soundsmith Zephyr Mk II cartridge, jmw memorial arm, a stainless steel vpi record clamp, playing through a Musial Fidelity KW500 integrated amp with on board phono stage. Sounds quite good, but my question is this: would I be better off at this point adding an SDS or an outboard phono stage? Or both? In what order? Thanks!
arsh
Thanks all. I did not mention that I use a Transparent Audio Powerbank 8 power conditioner. Will the SDS still have much of an impact in the presence of the Transparent, or is the power conditioner doing essentially what the SDS would do sonically? Thanks again.
The SDS is more of a speed controller than a line conditioner. Mine is plugged into a conditioner. If you own a VPI table and you want to get the performance from it, you must have the sds. Its like an automatic transmission for a car. Just get it. Then, shop for the phono stage.
Thanks Cerrot. Now the only problem is finding one. None of the retailers seem to have any.