I was realy blown away with the sound quality of the sounds from the Yamaha Motif ES series while visiting GC this past weekend. Has anybody had any trouble or would not recommend this keyboard? I'm a little skeptical when I hear nothing but "excellent" reviews about a product, it makes it hard to believe. I've checked the motif out ever since it first came out but thought it was just another keyboard. Hows that ES 88 key version? Was thinking about the rack version but had a change of heart after playing the ES.