What is the best graphics card out right now for NVIDIA? ATI?

No, probably not. It will stop being produced long before it becomes that cheep. Buy what you need now, don't worry about what prices will be. By the time that card is the same power as a 100$ card there iwll be far far far more powerful GPU's.

Find google as well, it is your friend

1) You should always try to have sufficient airflow with any gaming rig...or even an entry-level PC. If you don't, the heat just sits inside that box and will slowly kill your components...Anything from a 6 Series GeForce to a GTX 295. I would say at least one 120mm intake to intake cool air and at least one or two exhaust fans to expel the warmer air that generates from your rig.

2) As daedalus685 said, the GTX 295 will be out of production long before it sees THAT kind of price reduction...If it did stay around to let it drop that far in price, you're probably looking at two or three video card GENERATIONS ahead. Which will be improved in every aspect over that 295 anyways (or at least, should be). I don't expect it to drop in price by more than $100...Even with the next generation around the corner (ish), it's still an extremely expensive card to make. You're better off getting two GTX 275's in SLI, which is essentially the same thing as a 295 and is slightly cheaper...Perform better too.

3) By spending about $150 or more, you can basically max out Crysis in settings and enhancements (AA, AF, etc.) at a very reasonable frame rate. Since Crysis favors Nvidia architecture over AMD/ATI, even a $200 GTX 260 should achieve those settings at a reasonable FPS. A GTX 275 or above would be better assurance for smooth gameplay though.