My Spring has undergone quite a bit of improvement over the last 2-3 days, playing music overnight with amp off & listening to quite a lot during the day. The over riding impression is how real the music sounds. the dac is becoming more coherent with everything beginning to play well as a whole. Plenty of detail but never forced or distracting, everything very natural. I have not heard a large amount of other days & to be honest I don't think I need to, the Spring is playing music how I wish to listen to it, highly engaging & life like. I do not not have the option for upscaling with my Melco but don't feel like I am missing anything anyway. Since having the Melco upgraded during some repairs, the addition of minim server has given the sound much better air & spatial presentation. Will be interesting to see how much more the Spring evolves, think it will be in my system for a long time to come.