I picked up a Corsair K70 (because of the low profile keys and top reviews). It is absolutely a world of difference compared to the mushy MS Ergo 4000 keyboards I've been using for an age.
So pretty! (I turn off all the lights as it's not Christmas)
I wish I'd bought one years ago. It's like playing on a proper piano instead of a cheap Casio keyboard.
Now all I have to do is get used to something 3 inches less wide. Sigh
The other good thing about them is if they go wrong, you can simply get new keys. Much better for the environment.
And they help prevent you from getting RSI.
I highly recommend anyone who spends a good amount of time at their keyboard, to pick one up. You owe it to your fingers and hands!