I was on Cubase for awhile, but after some sessions with with msmith222 and his MacBook Pro Logic setup, I was sold.
What I liked about Logic was simply the workflow and the intuitive layout. I was able to to come to grips with everything rather quickly, and to add, loved the included synths and samplers. It's ability to bond nicely with Apple Loops is a plus as well. Of course, Logic, like any DAW, is not without its fair share of bugs and problems. However, I've found that Logic has been one of the biggest changes for the better in my production game.
Of course this is just my opinion. What it comes down to is what you're most comfortable with. I'll admit I had a bit of buyer's remorse after dropping the money on the MacBook Pro + Logic...but any remorse I had quickly disappeared. I like the aesthetics of the MacBook, the intuitive trackpad, the bluetooth capabilities, and most of all, the system reliability.
Cheers.