Refresh hardware


i’m searching for some hardware in addition to my current setup. I’ve got an yamaha KX49 as midi keyboard, but i’m searching for a new one.
I didn’t produce for a while, so my Cubase AI4 doens’t work on my iMac [Lion], outdated. Now I want to restart and looking for some gear.
My budget is about 300 euro/240 pounds/370 dollars. What do you recommend?
I’m aiming to produce hiphop/reggae.
For the midi controller I was thinking about the Akai MPK49, because I like to have the possibility to play some pianorolls.
Further, is the Scarlet 2i2 an good external soundcard for the iMac, or not an enhancement?

Excuse me for the poor English.