I'd say go to PortCon. It's the last weekend in June - it's a mostly Anime con with gaming also, and I read somewhere that there's also a Steampunk contingent. I haven't been in a couple of years, but it's fun.
http://www.portconmaine.com/One thing - this con makes me feel old - it is overwhelmingly teenagers, outside the gaming area. If that's a concern, don't go.
Eseme (unlikely to have that Obitsu before July, at the rate that expenses keep cropping up)