I am fond of most Linn gear, but I don't think the Unidisk SC is the way you want to go for a couple of reasons. First of all, remember the SC is also a processor/preamp, so a significant amount of the product's cost goes into these functions rather than just CD/SACD playback.
Secondly, the redbook on the SC is actually not as good as the Ikemi (the SC falls somewhere between the Ikemi and the Genki on redbook playback). If you can come up with the coin and find a good deal, a Unidisk 2.1 would be a great option. It is excellent on SACD and it is head and shoulders better on redbook than the Ikemi. I have seen these sell for $4000, but only once (between $4500 and $5000 is the usual price range).
I can't speak to modifying your Sony for SACD. I have never heard any of these modified players first hand. But if you have heard them, or at least have a friend recommending them whose ears you trust, the price does seem comparatively reasonable.
Secondly, the redbook on the SC is actually not as good as the Ikemi (the SC falls somewhere between the Ikemi and the Genki on redbook playback). If you can come up with the coin and find a good deal, a Unidisk 2.1 would be a great option. It is excellent on SACD and it is head and shoulders better on redbook than the Ikemi. I have seen these sell for $4000, but only once (between $4500 and $5000 is the usual price range).
I can't speak to modifying your Sony for SACD. I have never heard any of these modified players first hand. But if you have heard them, or at least have a friend recommending them whose ears you trust, the price does seem comparatively reasonable.