And it seems like you've done your research!!!
Main thing is for a beginner to get a proper sized board, and one that's not too stiff, too soft, too rockered, too cambered, or any other "too"... With all due respect you're not really going to be able to tell the difference in most boards until you've got a lot more boarding under your belt.
Every noob wants to buy good equipment, and that makes sense, but take your own advice and focus on the boots. Get boots that fit WELL, then get bindings that work WELL, and then get the board. Chances are you'll want something different in a year or two anyway so no need to go crazy on a board now... you can move good boots and bindings to another board down the road.
Oh yeah, just to keep the forum drinking game going: my GF started on a K2 Luna 149 (the predecessor to the Lunatique) and she's about 5'6" and 145 lb. She just bought a Prior Brandywine camber 153 and she's STOKED!!! But she has about 50 days of riding under her belt, about 6 lessons, and is ready for a more focused board.