I would have to say the G-70.
It has NO built in speakers , so the sound you get will depend on how much your willing to spend for either powered monitors or a straight keyboard amp.
It`s still an arranger , so I would look for a good 2.1 system , like this ; > link<
http://www.samsontech.com/products/productpage.cfm?prodID=1731&brandID=2 >link<
http://www.samedaymusic.com/product--SAMRES21 I hope this helps ,

Gary