I've auditioned my NL3 next to discovery, and I think discovery does a terrible job at emulating it's sound. All of those people that claim it's identical are on crack.
That being said, the Nords do not have internal effects, so the instant gratification is not there like with others (Virus, KStation etc...) This is made up by the actual sound quality of the oscillators (which are better that any other VA in my opinion, except maybe the JP-8000). The Nord sounds so good, it does not need to be drenched in effects. It certainly does sound fantastic through a sherman filter and a TC reverb/delay though. That's fine with me because internal effects always suck anyway. A nice small stone phase shifter brings out the warmth also.
The true magic of the Nord is in the interface. No other synth on the planet can train you in the art of subtractive synthesis any faster.....also, no other synth will inspire you so easily to create new/interesting sounds.
I say go for it. If you hate it, sell it.
sensorium (sen·so·ri·um) The term sensorium (plural: sensoria) refers to the sum of an organism's perception, the "seat of sensation" where it experiences and interprets the environments within which it lives.