Greetings from NYC and NeoGAF (possibly to Chris' dismay); my friend recommended me to this site. I saw that you've covered Go Go Curry, great place to eat.
Might I add a couple of other suggestions? I don't think many restaurants (if any) in the city will offer the diversity of toppings and authenticity that a place like Go Go will offer, but you might still like the food. These places might not necessarily be fancy, but it seems like they'll certain beat out Manpuku and Volcano (watered down Curry? Really?)
Yagura - 41st and Madison (no name out front, next to travel agency)
Men Kui Tei - 3rd ave and 6th st, W 56th St bet. 5th and 6th aves.
Sapporo - 49th st bet. 6th and 7th aves.
Seems like you guys are based mainly out of the West coast, so I guess you might not get to these places soon. However, if you're looking for new places in the area to try, they're fine places to start.
I don't suppose you'd be interested in having someone go eat grotesque amounts of curry and review them for you...?