FWIW, the 61 key version Pa3x will also arrive very soon at the Sweetwater.com warehouse according to their staff. Here is the blurb from the website..

"It's Arriving Soon! We've confirmed this item will ship soon from Korg and should arrive in our warehouse the week of 4/10. Go ahead, place your order now. We will ship it immediately, the very same day we receive it from Korg."

Korg PA3X 61 key

All the best,
Mike
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Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.