I really don't see EQ-ed sound as less pure as the "original " tuning, because reference sound is just an illusion.
As long as it doesn't botch the sound when applying eq-ing (which pretty much involves avoiding saturation --> Cowon Jet-effects, they've been doing wonderfully that for 20 years), I'm fine with adjusting the tuning to my preferences.
Of course, if you start with a source that is the polar opposite of your preferences, EQ-ing will be a pain, so I completely get the laziness argument.
But a little bit of tweaking can't hurt, as long as they forget graphical EQ (worst invention ever, it completely lacks the finesse that is required to equalize). Parametric EQ is so much more potent, and the LPG just rocks in that regard.
I just wish they would at least upgrade it with a touchscreen + buttons for the navigation part, I can't stand wheels anymore, it is so inefficient for browsing music libraries.
Once you've touched upon a dead-easy UI like Opus #1/#2, you can never go back to wheels again.