The korg has 4 outs, nut only 1 and 2 run through the valve bus.

the korg link is here
http://www.korg.co.uk/products/dance_dj/sx1/dj_sx1.asp

You can send or recieve midi, so yes you can use it to control other devices.

It will even sync itself to audio, so you can use it within a DJ set.

Obviously it`s not gonna make you produce solid gold all of a sudden.

It`s very much a case of quality in, quality out, so it`s dependant on the production of the samples you put in, in the first place.

But my main criteria for new kit were as follows, all of which it met.

1 Sound quality
2 Performance potential and control surfaces
3 Memory
4 Size and weight (you can get it in as hand luggage on a plane:) )