Depends where you live. MtGox if you are in America. Bitstamp if you are from Europe.
Thanks Sheldor333. Well I think both are fine just that right now I can't transfer due to bank phone verification issue. Main problem I find with Mtgox is the time they take to verify.
i personally like Localbitcoins
Just withdraw it to bank and buy off localbitcoins
I have been looking for this option too. It is just the trust issue. Just started with bitcoins and move with care at the beginning. I also saw that the scrow is kind of expensive in localbitcoins. If I do not remember bad it was like 10%, right?