It's a piece of cake to MIDI into a G1000 (had two independent sets of MIDI ins and outs). If he already likes the G1000, how about a nice 88 to add to it? Combined weight, if he goes for your Yamaha 88, Ian, might still be little more than the Korg. Sadly, the 588 is based on the PA500, not the 800/PA2X, so a lot of the goodies (and polyphony) are missing...