I had a similar challenge only reversed a few years ago when I upgraded to an Integra Pre-Pro from a Rotel surround sound receiver. The Integra only decodes DSD from SACDs through one of its HDMI inputs. So I had to then upgrade to an OPPO BD-103 and invest in an AQ HDMI IC. I listen to mostly multi-channel SACDs. Are you listening to multi-channel or two channel SACDs?
I was using an NAD T-535 universal player for my SACDs but could no longer. I still have the NAD unit and now use it to play just standard CDs. I suspect that any new SACD players (probably most likely universal Blu-ray players or higher end reference players) are only going to send out its DSD through HDMI. Now the challenge for you is to indentify new SACD players that output its DSD via analog and not just HDMI and also play SACD/FLAC files and not just discs. (I just took a quick look at the Marantz UD7007 for you but only through HDMI). I'm not familiar with how well HDMI to analog SACD converters work. My gut tells me this would not be your best & final solution. You always seem to lose something when using converters. You may want to consider changing the integrated amp end of your new build. Just my two cents. P.S. I'm thinking of selling my T-535 which would resolve part of your issue with playing SACDs through analog outputs. It doesn't have any inputs (USB) for playing music files.
I was using an NAD T-535 universal player for my SACDs but could no longer. I still have the NAD unit and now use it to play just standard CDs. I suspect that any new SACD players (probably most likely universal Blu-ray players or higher end reference players) are only going to send out its DSD through HDMI. Now the challenge for you is to indentify new SACD players that output its DSD via analog and not just HDMI and also play SACD/FLAC files and not just discs. (I just took a quick look at the Marantz UD7007 for you but only through HDMI). I'm not familiar with how well HDMI to analog SACD converters work. My gut tells me this would not be your best & final solution. You always seem to lose something when using converters. You may want to consider changing the integrated amp end of your new build. Just my two cents. P.S. I'm thinking of selling my T-535 which would resolve part of your issue with playing SACDs through analog outputs. It doesn't have any inputs (USB) for playing music files.