George, I had an M-audio Oxygen 49 keyboard, that I did NOT like - the feel of the keys was too spring loaded. The cheapo Casio keyboard I bought for my kids has a better key-feel.

Either one, even without the power supplies is going to be a good deal. The keystation 88es has semi-weighted keys. Not sure about the other keyboard. Which one feels more natural to you? I would go with that over any other aspect of either one. The Keystation 88es has mod and pitch bend wheels, which are quite handy. I don't buy any keyboards without them, which has kept me away from entire brand offerings (Korg for example).

Which model has 88 keys and all the knobs and sliders?