I know what you mean. I use some EQ on the 007s to light the treble a bit. The only trouble is, digital EQ does resample the bits, so some loss of speed and soundstage wish seems to occur. DMQ EQuick is as transparent as any EQ I have tried so far. Built in EQ's in players tend to be a bit crude. I would still say try some NOS Mullards if you get chance. It isn't just the treble quality, the midrange realism and presence on the real deal Mullards is special, what they are famous for. And IMO avoid any EQ keeps things transparent / intact.