Have you ever tried the SACD's that are giving you trouble on another player? It only happens once in a while, but sometimes I find that, occasionally, a disc has some compatibility issues or is just defective. You should be able to tell, even if the other player is not a high end unit. Anything that plays the formats should work fine for a test.
Also, you said you checked phase. How did you do that?
Also, you said you checked phase. How did you do that?