Marcel,
The XV2020 is a great module for the money but keep in mind that it does not have a display that shows anything other than the number of the voice you are using. There are no voice names or anything else in the display. Most of my customers who are using it for live work prever the XV5050 which has the exact same sounds, but has a full screen with all information listed with full names and other information posted in the screen. The difference in price is about $250.00 but keep it in mind. You have to memorize the number to call up the right sound or have a list written down to know what sound you need. The Roland modules offer a much larger set of voices stock than the XD9 keyboard and these sounds are outstanding. The ability to put an additional 128 MB of Roland sounds in later is another plus. If you need great orchestral instruments, Roland has released a new expansion card that features all the sounds from their Orchestra 1 and Orchestra 2 voice exapanision cards plus the vocal card voices and the best of sounds card all in one board. This gives you tremendous possibilities. Although the sounds are great in the XD9, there is not nearly as many variations of sounds as you will find on the roland module.
George Kaye
Kaye's Music Scene
Reseda, California