Ive had 4 midi Keyboards, The Novation Remote Sl61 is by far my favorate. The onboard screen makes my life a lot easier and the 32 assighnable buttons are great for launching midi clips in live. I have an APC 40 preordered but they pushed back the release date from march 5 to may 11th.
http://www.akaipro.com/apc40videos Check it out if you havnt already.