As for pianos; I feel there's a difference between the piano included in say, a Motif, which has a known and limited set of velocity layers, and a gigabytes-and-counting piano library for a computer.
In a way, Roland's solution to just do away with the memory and model the thing is sane. The compromise is only in the processor speed and algorithm quality, and with one doubling and the other improving every few years since more speed = more possibilities, it's good. That perfect sampling recording session with pristine mics and converters is harder to top.
Feeling is the next step. The quality of the feel of the instrument amplifies the enthusiasm; rather give me a piano sample that doesn't span gigabytes but with a great-feeling set of keys than an awesome multi-gigabyte library with a cheap controller.
Properly micing a piano isn't easy, and for that reason alone I'd be happy to leave it to people who've been doing that for the past 2 decades and who've put the result in a box.
The Mac is still sitting in the box waiting for my friend to come over and install Logic and show me the basic OS has I've always used a PC.
But you bought this thing because it's advertized as being easy to use and set up, and because it just works(tm)!

Why not go ahead, pop in the DVD and follow the instructions on the screen? From experience I can say that it's far easier than installing Windows 98 or XP

.
Installing Logic isn't a chore either, because you have far less to worry about (e.g. where should I put it) than on Windows.