I live on the west coast, so I would have to fly out. For reference: I went to Metagame and it was awesome, definitely worth the flight. I did not go to any of the previous Manifests but in retrospect I regret this.

My compunctions about Manifest x DC are that it's not at Lighthaven, which just on priors suggests lower-quality organization and venue. And it's only 1 day, so even if the daily average quality is the same, that caps out at 1/3 the awesomeness of Metagame/previous Manifests.