I bought the SDS and the outer ring clamp and found that both make an improvement in the sound. The SDS provides a subtle, but audible improvment. The sound from LPs, especially the lower end, consistently seems more solid with it. The outer ring clamp allows you to play all but the most warped records. I sometimes wonder about spending the additional $1,200-1,400 on the better motor and bigger base, but I until I hear it, I'm skeptical that it would be worth it. As for Teres, without doing a side by side comparison, which is almost impossible, you'll never really know which is better. Why not just make the reasonable improvements on what you have, and not get caught up in constant hardware upgrades?
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