so I wanna build the Pi 2

I am new to speaker building and am looking at building the Pi 2 "bookshelf" model. I have heard lots of people on the net liking these, but am somewhat leary about using the same driver that i just put in my guitar cab for my home listening. I am looking for a dynamic speaker for symphonic and progressive rock music. I only have about a 200 dollar budget to build these, but was wondering if there are better drivers that could be used? Also, would 3/4 birch plywood be a good material to use?
I would be driving these with a McIntosh MA-5100 amp.
Ben

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