Sabai,
I highly recommend you NOT to listen to the XDS1 if you want to keep your CDSA-SE because it will make the CDSA-SE sound only 2D, flat and lifeless in comparison even though the CDSA-SE is a great player IMO. The XDS1 is a totally different animal remaining in their signature sound but clearly night and day better in all areas. I sold mine straight away and moved on.
I highly recommend you NOT to listen to the XDS1 if you want to keep your CDSA-SE because it will make the CDSA-SE sound only 2D, flat and lifeless in comparison even though the CDSA-SE is a great player IMO. The XDS1 is a totally different animal remaining in their signature sound but clearly night and day better in all areas. I sold mine straight away and moved on.