After 5 weeks of research, I chose to buy a Korg C1 Air. It was a gamble because I was unable to test out various brands & models in store. But online, Korg owners seemed happy with their purchases, had the fewest complaints of keys becoming click-y or sticky, and raved about the keyboard action. After two weeks of ownership, I love this piano! The various piano voices are excellent, and by tweaking the settings, I can get the perfect tone I want for a piece: brighter, mellower, more resonant, whatever fits the mood. The other voices are really nice too & are a lot of fun to play. The star of the piano is the RH3 action: real piano feel, responsive, expressive. Not too stiff & heavy, not too springy & light. The keybed is so quiet & even to play: no clickety noises or thumping. The Korg keys have long pivot points, so playing near the fall board isn't fatiguing. I worried about the "glossy" key texture, but it's more like a satin finish than slick & glossy. You won't slip & slide on the keys. The cabinet is sturdy, the stabilizers do a good job of preventing rocking, & the soft close cover is a great feature. The control panel buttons have a solid feel, & the functions are quite easy to figure out. Overall, the Korg C1 Air feels like a solid, high quality instrument that will provide many years of piano enjoyment. I love playing it.
New England, USA