The EA Store is currently hosting a promotional deal that can get you $20 off of any game over $40 (OK, fine, technically $39.95). By using the super-secret coupon code (PAXEAST842) you can get a nice discount. If you feel like buying more than one game, get them in separate orders and continue using the same code. The deal is likely to end around the time PAX East does. Need some help picking a game to use this for? I've done it for you:
BF:BC2 is already $10 off, so it works out to $20
ME2 on sale for slightly less than $40, so to get it you'll have to add something else. Cheapest is probably the $5 ME1 Pinnacle Station DLC, otherwise there are quite a few $10 games, you might be able to find one that's semi-decent to add.
Dragon Age: Origins
Crysis Maximum pack, if you feel like benchmarking.
There is a note in the EA store terms that says the ability to download only lasts a year. People who have bought games previously have confirmed that they can still download over a year later, however this may no longer be the case. It is recommended that if you buy something, you back-up the install files someplace safe.