The Ergo isnt even in the same class as the S2 in my opinion…the jogwheels and feel of the ERGO is more like a CDJ200…its cheap feeling…all the knobs and buttons are plastic…and has those damn annoying ass lights.
The ERGO is meant as a consumer product.
The S2 and the MC3000 are more professional products…I know i might get flamed for this
IF i were to choose between the S2 and the MC3k i would have to go with the MC3k purely on the construction factor…You could probably kill someone with the MC3k and still be banging out a good beat…S2 not so much.
The Only real advantage the S2 has over the MC3000 is the Tighter integration with Traktor and also the S2 comes with a full copy of Traktor Pro 2.
Im pretty sure the MC3k also has a hybrid standalone mixer mode which is a big bonus.