Hi Bill. Great question. I have the QSD-1, QS-D1000 and the lowly QS-1. I have found that the QS-1 provides a reasonable QS experience, not quite as discrete as his bigger brothers but adequate. I also like the four meters. I have tried the RM Matrix setting on my Sony SQD-2020 and found it horribly lacking, as the reviews of the QS-1 might also lead you believe. If you can find the QS-1 cheap, like under $75, it is more than worth it. It is also much better than the built in R|M decoders in most non-Sansui receiver. I hope this helps. Now, trying to find any of the better QS decoders in the US is very expensive, but there is another option. I use Buyee.jp to buy from Yahoo Auctions Japan. If you look a few times a week, you will come up with one in time. Be prepared for a shipping of about $120 when you decide how much you bid, but be aware that you can hold off on shipping for a few weeks to help ease the burden. I buy stuff in the first week of the month and pay for shipping after the stuff arrives at the Buyee office and I let it wait until my next monthly income arrives. Also, check with your local electronics shops and record stores as they will pass on buying them unless they know someone is looking for one. I got mine for $20 at a local record store that buys electronics with its collections. Of course, letting record stores know that you buy any quad at reasonable prices induces a small influx of 4 channel goodies, or at least that has been my good experience. Hope all this helps.