That's about the only deal out there. Amazon even bumped their pre-order price up from $57 to $60. The pre-order "bonuses" in the US are very sparse and prob. shouldn't sway your decision. Only thing keeping me from getting it from TRU is that I want it on release day.
I actually pre-ordered it from Best Buy in-store today. They're offering 40% bonus TIV when you pre-order a game during the same transaction. I traded in Portal 2 and NFS:HP which are both still getting surprisingly high TIVs. With the 40% bonus I got $53.20. Combined with the $10 off coupon in their @Gamer magazine this month, my pre-order is covered.
Not a bad deal overall if you've got some games you want to ditch. This route was also great as I'll get the game on release day, which even Amazon is no longer offering, and TRU definitely won't swing.