If I would choose between a Roland G-70 and a Korg PA1/X I would choose the korg. I don't like much immitations of it but it has great sounding drums in comparison and the basses are rather good too. I think I would choose it because of drums and bass, but mostly because of the drums. The Korg PA1/X is a very clean sounding keyboard (little noise in the signal path), so in that regard it is good for recording. Unfortunately it cannot immitate real instruments very good so you would end up with a lot of spacy pads, synths, drums and maybe some basses. But because of the bad organs and accoustic pianos I think it doesn't overall win over the G-70, it's just that drums are really important on a mix and it has better drums than the G-70.