Maybe you can try to get ahold of a Roland G1000. It is a little older model, buth a pro board that you should be able to pick up for around 1000,-- now.
I use one myself, and it has a lot of options that the other boards you mention do not have. If you are into sequencing, the G1000 has a Double set of Midi Connectors. The Yamaha's do not have a MIDI Thru !!