Why SACD? The format may change or not be in existance long term. You have a very revealing preamp with the X-1 and a good power amp. Your system will pass along whatever the source tells it to. In audio, spend some money on your source. I have been using the Sony SCD-777ES but when I upgraded to better speakers, I found the Sony very harsh sounding. I have been trying out various DACs with great success. There are many very good DACs for $1200 used such as the Electrocompaniet DAC. This will take your system to another level without compromising sound for a $1200 player. See my DAC thread for more info or email me on this direct.
Happy Listening.
Happy Listening.