The two modules you have not included are the Solton X4 and the Generalmusic WK2. Both of these have better styles in my opinion than the korg i40m and the WK2 arranger with the Hard drive option and the included vocal harmonizer and guitar effects processor sells for under $1000.00. I like this module alot and you can program user styles which the Korg i40m can't do. We will also be selling next week the new WK2 oriental arranger module which will be the only dedicated oriental module with direct quarter tone buttons and arabic styles and sounds built in. For portability and good controller options I would also recommend the new generalmusic rPP7 digital piano. It features an 88 hammer weighted action, 64 voice polyphony, 48 sounds plus 444 generalmidi sounds via a midi input, a pitchbend and mod joystick, weighs a mere 40 lbs. and sells for $895.00. This would be another really good option for a really good and affordable keyboard/module combo at a really good price. I can think of other options as well, but this one would sell for under $2000.00 and give the player a ton of power. Add a pair of Yamaha YSTMS-50 powered speakers and you've got a great set up.
Regards,
George Kaye