The 5400 is a clear winner I have 1,000s of hours voicing sysytems and especially with modificationsand capacitors.
The 5400 platform once runin which takes some 500 hours to fully run in I played mine 4 weeks straight and have heard subltle differences after 3 weeks a very natural warm tone with excellent inner detail and very taught Bass.
I am going after the max potential ,for 1 music direct sell 1 ampslow blow Hifituning fuses ,a clear improvement ,a solid digital power cord and quality cables also 3 damping sheets buy 3 for the transport and all over the top cover and sides , .I al replacing all the stock electrolytic capacitors with the Nichicon fineGold series
also the Best clock and regulator board out there by far the Terra Firma clock modificationwhich is a revelation .
The 5400 have a excellent platform to build on as several Modding companys are douing this ,the dual R core transformers are excellent as well as the Burr Brown 1796 dac ,the opamps are also BB.for under $2k in Modds this unit will go toe to toe with ANY player in the $10k range with No problem. I heard one 2 weeks ago ,I brought my player as a direct comparison,it was destroyed compared to.
The word High quality Analog and natural are the only ways I can describe the sound in a brief term well worth the expense IMO.