Looking to buy a new portable light weight STAGE keyboard. I own a yamaha DXG670 which I love but it's too heavy for travel. The new one MUST be more advanced than DXG 670, have built in speakers, USB port , 88 weighted keys, less than 30 lbs, microphone port, would like arpeggiator but optional. Use is for church performance & solo venues. Other keyboard recommendations are accepted.