Width is a potential problem on that module. It will nearly touch the header pins, but it should still fit.
For the RN2903 I can use a single SMA connector on one end just like the RFM boards. For the RN2483, I'd have to use two u.FL connectors, or extend the board out to fit two SMAs on there for the dual bands. Which sounds better?
Also, does anyone actually use all of the GPIO pins on these modules? I might be able to bring some of them out, but definitely not all.
Dan