I suggest you get into scrypt mining. Even if you drop 600 USD on a graphics card and later find out that mining is not for you, for whatever reason. It will not be the end of the world because hey, at least you have an awesome video card for gaming. Or if you don't care to game, then sell your video card on ebay. You may even make a profit.
ASIC mining is much riskier. If you can't get your ROI via mining, you have worthless hardware on your hand. NO ONE will buy outdated ASIC gear from you. You will not recoup your cost of purchase via resale. And that expensive ASIC CANNOT do anything else, unlike your video card.
These are just a few reasons why scrypt mining is becoming so popular.
Bitcoin mining is a game that you had to join a while ago to make some $$. And then reinvest that $$ to stay in the game. It costs a significant amount upfront to become a profitable Bitcoin miner. You CAN if you are okay with taking a MULTI-THOUSAND dollar risk.
Or if you are like me, you'll just mine scrypt and not worry to much about the video card purchases.
This is a very good point that scrypt mining is a lot less risky. However after scrypt ASICS are created these cards will become useless and the same thing for scrypt mining will happen as what happened to btc. Right now though it definitely makes sense to go for scrypt but you'll have to move soon to make a return on ur vid card and the way the market works is, if everyone is trying to dump their high end graphics cards they will end up being worth pennies.