I found a place in Portsmouth that does VERY good sushi. Any NH visitors, call me beforehand.
BTW--I "invented" (read: stole) an idea from my favorite all-time sushi place (Yakitori II--San Diego) and had them make it for me. It's called Pizza maki.
Take a CA roll, top the slices with spicy mayo, put it in the toaster oven till the mayo just starts to brown/carmelize, then top each piece with a little dot of Siracha hot sauce. Friggin awesome.