How long will you be in the states? Birth by Sleep miiiiight be out by then. On the other hand, if it's only a couple weeks, you may not be here for Valkyria 2 (it's not until the last week of August) Otherwise...
The DS Atelier game is Atelier Annie.
If you're getting DQV, you may also be interested in DQIX.
Lufia 2 remake is not out over here yet, that I know of.
The Disgaea visual novel is out on PSP, if that's something you'd be interested in.
I believe Nier is a PS3 game. *research* ah, dual system release. So either way.
Dragon Age is PC/360/PS3, so whatever floats your boat there. The first expansion is also out.
I don't think Tal really liked Last Rebellion? He's the only resident player I know of.
He and Tide, however, did like resonance of fate.
ToS2 is really good! Feel free to buy.
On the rarity scale... AI2, Knights in the Nightmare, and ToS2 are games I haven't seen in stores in a while. The rest are recent or unpopular-but-well-printed enough to be in stock, at least for me locally.
Additionally... Mana Khemia, Sakura Wars, Oz, Strange Journey, Hexyz Force, P3p, Arc Rise fantasia and the PS3 crossover games will probably have be be picked up new.
Otherwise, they only game I've played in the past year that you don't have listed there is non-RPG stuff. That said, Edgeworth is a worthy buy.