I just cashed out 3300$ worth of BTC via bistamp.

I am wondering if mining is worth it and where I can start.

Which miner should I buy? Should I wait for Scrypt or stay with BTC?

I like the idea of Scrypt since it might make a lot of profits in first year or so, but I am worried it will be denied and just shut down as it begins. Also with BTC Miners I am worried because in just a couple months more powerful ones will come out until the ones I will buy produce close to nothing.

Are there specific miners that are worth investing in?
What do you guys think.