My choice was Tales of Graces, but that is a terrific list. I would put them in this order:
1 - ToG
2 - Monster Hunter Tri
3 - Metroid: Other M
4 - Mario Galaxy 2
5 - Arc Rise Fantasia
6 - Sin and Punishment 2
And I agree that it would have been great to include NMH2, Redsteel 2 and Fragile, at least.
Well, no wonder why we all say this seems to be a terrific year, specialy considering Zelda is also released this year.