macsareback - are you sure that you want to start into this system before you really understand the differences between the modules?
I'm sorry if that's a silly question as I'm coming into this conversation late, and I apologise upfront if this isn't the case.
I'm the sort of person to research a camera for months (and months) before buying one. (My GF is looking over my shoulder and enthusiastically nodding at my recognition of 'that problem'.)
Personally, I am saving up for an A12 based module because as large sensor modules they have better image quality. My GX100 is a small sensor camera, with relatively poorer image quality, as are the P10 and S10 modules, so I am not so interested in those.
I'm not buying until I'm very clear about what the GXR has to offer me. Knowing the strengths and weaknesses of the lens modules and which best suits you is very important with the GXR. It is a very different camera based on the different modules and each module is a lot of money.
I may be totally off-base and I'm not trying to discourage you from the GXR, but it is important to make sure you buy the best module for your needs.
The only argument I have for you keeping your current GXR plus P10 is that if you are in the US (and it seems you are), that the P10 kit is a relatively inexpensive starting point. The P10 is only about $150 on top of the GXR body. Assuming that you are comfortable with the GXR system, it's not a bad place to start.
Otherwise, you could return the camera in the short term and ask all your questions here and on dpreview to solidify exactly what you are looking for and which module is best for you. Everyone in Ricohland is very friendly and would be happy to answer your questions.
