Mainstage 2 Equivalent

Sorry, I know that this is not maybe the place to post this, but this forum has provided the best, most informative information anywhere that I have seen.
I have had the chance to look at Mainstage 2 in Logic Studio 9.  To say the least, I fell in love with it.  Is there any PC equivalent product that anyone here can recommend?  I'm getting old, and the idea of having a 25 pound controller and a laptop when I play out is getting more and more appealing (as is the idea of staying home altogether).  Also, in the same regard, can anyone recommend a robust, low latency laptop that would do the job as well as a Macbook Pro 2.66.
Thank you,
Paul