John, I researched this extensively about 6 months ago with an eye toward finding a lighter fully weighted board and for my requirements there's nothing and I tried them all. Virtually every pro quality 88 key weighted keyboard is from 55 to about 75 pounds and big. Very awkward for us older folks to haul around. However, if your wife is focused on just piano then this could fill the bill
Casio PX-320 I agree with the comment that Casio's have always been basically toys but the new Privia series is pretty good. 88 weighted keys and it weighs about 30 pounds. It doesn't work for me because of lack of different sounds and no midi out so I can't control my Sonic Cell with it but it does have a USB connection so it could work for your wife. Since size and weight are important to you, I think this Casio is the only game in town unless someone has come out with something new in the last few months. Everything else by Roland, Yamaha, Kurzweil etc that is fully weighted and 88 keys is big and heavy.

Bob


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