i too have the same impression of the wharfes before, ngo-ngo. had an 8.1 dint was able to use an 8.4, was really unimpressed until just lately, when, i had a chance again to use an 8.3.
at first it was all the same (ngo2x and weak bass which tend to sound boomy), thought the previous owner had it for 6 months or so, i could see that it was not fully broken-in as yet. so after a few session with the magic cd and the xlo burn-in cd, it opened up a bit, from then on my impression totally changed! now with the addition of new speaker cables (bi-wiring) and some other improvements on my system, i had a hard time letting go of it.... well if its not of k0yas persistence i wouldnt have let go of it, well maybe except for chito.... of course.
added note: i had it only for the sole purpose of selling it latter on, a transistion period until i found a new floorstander that would tickle my fancy, what happened was that the 8.3 was the one who tickled my fancy instead. hay... sabi nga lagi ng isang guru: "kung ano pang maganda sya pang nawawala sayo, d bale happy naman sila. share the experience nalang"
ill miss my 8.3.