Nikon J2 vs Sony Rx100

You mention you have a DSLR kit, which brand? If Nikon might be worth going that route as there is a Nikon to Nikon 1 adaptor. Going through eBay I see quite a few lens mount adaptors for the Nikon 1 system though off brands are fully manual.

One reason why I picked up a really cheap V1 yesterday then ordered a Leica M and Canon FD adaptor off eBay.