EQ...
I tried using laptops for live performance, but after a few unexpected crashes I decided to go back to using hardware synths. It's just a nature of ANY computer to crash when you least expect it to . Laptop/Desktop is great for studio work, but by no means live performance. It WILL crash. Especially if you're going to be using soft synths.
I'm not talking about crashes that happen 'cause you didn't configure your system properly. I'm talking about "ERROR CODE BLA BLA BLA" crashes that have NO explanation.

I think something like a fully expanded MOTIF will do a better job. At least in respect to reliability.

-ED-