Bryan ,
The difference between the sounds of the X4 vs. the XD3 is a good question .
All the solo sounds such as piano's , brass , saxes , strings are all better on the XD3 IMO .
The styles are more useful as well . Ketron removed most of the 8 beats , 16 beats, jazz organ , acid jazz and big band , swing styles . You do have access to these styles via the pattern memory . I have recommended to all my customers to add the pattern expansion chip .
What you do not get is 4 outs , 16 track sequencer and sampling with the XD3 .
If you do not need these options , the XD3 is a winner ! reasonable pricing as well !
xd3 is 2 inches smaller in width .
dano
------------------
danosmusic@yahoo.com