ngky7,
my band and I were walking around sourcing for keyboard. our budget was about 2.5k-3k.
but after when we saw M50 and asked for a demonstration, we decided to get the KORG M50 either 73keys or 61keys. And yes, I would recommend M50 to people with budget as it cost around 1.1k (discounted during xmas, but not sure if price will return to 1.6k as per normal), whether they are amatuars, arrangers, pro keyboardist, etc. It's powerful and affordable and MOST importantly, the sound library IS AWESOME!! =D
Awesome coz it sounded real - the drums, bass guitar, strings, piano, etc~
When I used the piano, the touch was like 70-80% close to an acoustic piano. (i'm not really a pianist, but played on a yamaha grand piano for two years, so you can trust me for that). I really really like the touch =) OF course, u can't compare to an acoustic piano LAH

cannot compare apple with orange! I think 88 keys are weighted keys, the rest of the two models are normal plastic keys :/
unfortunately, and ARGH unfortunately, we've need to wait till FEB for next shipment.

kaoz, we should have just grabbed it that day!
*Additional info: I think M50 is like the LE (light edition) version of the M3, which is a pro equipment. Not too sure, but really seems so

once again, awesome sound!