Though I'm the owner of the original EAR+ with separate balance and volume, I did have Dr. L. perform special upgrades and restorations just before Ye Olde Warranty petered. Since my geezer now contains Auricaps and Black Gates which are comparable to your young'un's, perhaps I'll peel off a few dusty recollections from my otherwise fossilized lobes.
The EAR series was thought to pair well with Grados partly because they favored low-impedence phones. Lloyd has always argued against this idea; so have I (though, admittedly, I haven't experienced the vaulted Antique Soundlabs synergy with Senns). I do love RS-1s with the EAR; on the nether hind, MS2s become urethra-shreddingly bright.
As a preamp, I find the EAR+ to be perfect for lusterless solid state amps. It brought such sparkle and clarity to my then-pedestrian Technics integrated that I couldn't believe my good fortune when I first brought it home from the Poke Orifice.
Sadly, I can't say the same for its synergy with brighter solids and speakers, especially my Arcam A85 and B&W 602s: I've assigned the EAR to the Arcam's tape out for most sources. Though I listen to my turntable through the EAR without Arcam's intervention, its current preamp skills languish (sputter, creak).
In terms of color schemes for the EAR, I tend to favor the red. Someday, my beaty-blushed wood-pre will reside comfortably in my Stendhalian bedroom (with its theme of scarlet and black). Until then, it manages to fascinate most of my clients by glowing and gilding my otherwise sallow living room. (Budget studio musicians take note: the ruddiest-hued EAR pairs well with Tannoy Reveals aurally and visually.)