and as for bitcointalk, this here is P2P currency exchange so you will end up getting less to sell and paying a lot more to buy bitcoin than the market price. and the same goes for localbitcoins, but they are best choices for keeping your privacy.
there are also Kraken which seems to be good although i have not used it.
and also btc-e which doesn't require any kind of verification.
Still, it's a good exchange. The fees will kill you, unless you can use SWIFT, and they are still a beast. Verification was a pita, but that may have changed in the years I was gone.
Coinbase, moderate hassle. Will require veridication, but its quick. Lowest fees of the bunch you have presented, and they are 100% in my experience.
LBC, moderate fees, but the least hassle. You don't need to verify for some merchamts, and offers the rare opportunity to buy bitcoin with cash bear market rate. Lots of spammers, but not hard to avoid them if you use a trusted. Escrow is built into the platform.