in regards to option 1, yes those would be your left, center, and right speakers. either option would be good. It is nice to always have 3 identical speakers up front for the best timbre matching, the bookshelves (P6s) will give you a little better bass response, but I don't think you would ever notice it with your crossovers set anyways.
I guess I am saying that I would rather have the LCR system.... That sub looks decent enough. If you can search for the Energy ESW-V8 on
www.wwstereo.com, it is about $199 or so, and it would be a little better of a sub for not much more money...
I have never heard these speakers as they are an internet direct brand. I would just check on the return policy in case you don't like them once you get them.
Good Luck.