Check Walmart.ca if you want to see what kind of deals Walmart's got on TVs.
I'd suggest creating a 'fake' gift for her to throw her off, and at the bottom of the box, have a picture of a TV. Then you go buy it on Boxing Day to save money and get a potentially better TV.
She knows I'm getting her a TV. I told her I'd get her one for mothers day but I didn't have the budget. Now I do. I did check Walmart for deals, but don't wanna get her a Phillips or Emerson. I've had an Insignia forever, never had problems with it. I checked out Futureshop and they have a decent price going on for a 39". Might check it out Sunday