I like the Sony SA-5400 ES SACD player a bit better than my Marantz SA-8001. It seems to have a bit better detailed resolution and clarity. The Marantz has a more rich, tube-like sound at the expense of a bit of detail and clarity.
The reviews of the SA-5400 were outstanding - Google them. You would be very pleased with the improvement in sound - unless, you like / prefer the warm sound of the Marantz equipment.
If it were me... I'd get a NOS / lightly used Sony SA-5400 ES and an extra laser sled / laser assembly for it - off eBay / Amazon. I would not get it without the backup laser sled / laser assembly - which is the most likely part to need replacement after a bit of use. Sony does not support their products after about 7 years - so, be fore-warned.
The reviews of the SA-5400 were outstanding - Google them. You would be very pleased with the improvement in sound - unless, you like / prefer the warm sound of the Marantz equipment.
If it were me... I'd get a NOS / lightly used Sony SA-5400 ES and an extra laser sled / laser assembly for it - off eBay / Amazon. I would not get it without the backup laser sled / laser assembly - which is the most likely part to need replacement after a bit of use. Sony does not support their products after about 7 years - so, be fore-warned.