Actually a sound module properly integrated into the setup is great...it is just like it's not there..BUT, in order for that to happen all the setups you use must have all the MIDI bank/pgm changes all IN THERE so when you select a style / performance / registration / song book entry for a song all the MIDI messages get sent out to the sound modules (and light controllers if you wish :-))

Many PRO setups on stage use sound modules all over in the corner in a rack...just works.

All that said...Get the T4 as the Yamaha arangers (T3 in your case) do not have a very PRO level of MIDI implementation and it will drive you crazy!

Lee S.

[This message has been edited by leeboy (edited 10-05-2010).]