I really like the sound of the whole Vintage Compressor series from Native Instruments. I don't know if the VC 160 actually sound identical to a real DBX 160 but I don't really care as it's the result/sound that counts which is really good, flexible, fast to operate and warmish.
They're actually modeled by Softube and compared to the Waves DBX 160, which I own as well, the VC 2A sounds a bit more warm, polished and tamed where the Waves can be made to sound more raw and aggressive if pushed harder but at softer settings they sound quite similar to each other. This makes the Waves DBX 160 a little bit more flexible than the VC 160, if you're into that sounds at least. But the VC 160 still sounds very good and you can buy the whole VC bundle (during a promotion) for the price of the Waves DBX 160.
I actually quite like the looks of the VC series as they seem to hint to what they are inspired by rather than having a photo-realistic GUI and they are quite easy to the eye. I ended up buying the whole Vintage Compressor bundle as they all have a similar "sound" to it, which I quite like.