I haven't still figured out what to think of the J1/V1. And of the P7100 for that matter.
The J1 has a built in speedlight, but no EVF, yet has the sleekest overall body shape.
The V1 has an EVF but needs an external one speedlight. Unfortunately it can't take the SB600/700/800/900/SU800, only a small SB5n. I've seen no indication that the SB5n can do
remote/commander mode CLS. The blob on top fromt the EVF makes it clumsy to pocket.
The P7100 has a speedlight built in, can mount the SB600/700/800/900 and SU800 has CLS, but the OVF is only so-so.
Nikon should put the three in a bag, rattle it around for a bit and come out with the best of the three.. Then they'd have a winner.
The only reason they've not done that, as far as I can see is fear of canibalizing their own line-up. Which is weird, cause if there's anyone eating into your sales it should be yourself, not another manufacturer..