Yes I know Diki...I did recommend the Yamaha YPG (88 key) and Casio WK3800(76) at first.
According to Bachus, he is taking arranger lessons...not piano.
If it was me I'd get him the MMO6 and computer speakers...or the E-50, but his teacher should be consulted beforehand in any case.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.