I built a Seduction with C4S back in 2009, which has served me well for five years. Currently, I am running JJ 6922 tubes in it, and upgraded the output coupling capacitors to 2.2uF Mundorfs (oil) to better drive a long, low-capacitance interconnect going to my Stereomour.
Now I'm thinking of building the Eros, but want to make sure it won't be "too much of a good thing," as I am currently running a mint-condition Technics SL-10 that I've refurbished, along with a cartridge equivalent to the AT120 (I think it's the TC350, which is an older p-mount version of the AT122, itself a version of the 120). Being a linear tracker, the sound is exceptionally clean and low in distortion, and as such, can be a bit lean on some discs, sounding almost like a CD. My understanding is that the Eros will probably net me a lower noise floor and higher gain, which are never bad things, but will that EF86 driver tip me too far into "CD-like" territory, given that the player already sounds so clean with the Seduction? If the Eros will simply give me even better soundstage/imaging and deeper bass, it would be a worthwhile improvement....