Mike, I for one as well as maybe Chas[Sonic Cell owners] can attest to the pristine sound in the Sonic Cell..including the recording audio interface..
I was looking to the Sonic Cell as a wav/MP3 player..and was only disappointed by the maximum files [99]..The player is great..

Likewise, the Ketron sounds are very good ..especially Bass and drums...but not all the sounds as with most brands..

Remember the MidJay also has arranger features...and the Sonic Cell has the better Audio/midi interface.....neither have the "Scat" voices..