I've never traded there, but Stamp seems to be the most legit to me...They had a major issue and fixed it very quickly in comparison to any other exchanges, which shows their customer service is legit. If you want to go higher risk, go Gox and get cheaper BTC but there are rumors they are becoming solvent. BTC-E hasn't had a problem yet and that's where I trade. I personally haven't had any issues but I've read their customer support is TERRIBAD. I read a few threads this morning myself and started wondering if I should switch to Stamp, heh.