My initial thought for 2 100s was that if one decided to crap out on me, I have the second one still working and can swap the GV # over to it until a new 100 arrives. But the few added benefits of the 202 may outweight that.
How is the reliability of the OBi's? Any model breakdown more then the other? Do they have the reliability of say a Switch (which usually lasts forever) or maybe a regular router (which for some reason only last a couple years for me)?