Hi first post. New bitcoin user from Singapore. I am only interested to buy bitcoins, for now. I used FYB-SG exchange to buy my bitcoins but however, I find that the asking price is quite high compared to the market price if I would to buy a number of bitcoins. SGitcoin offer much more lesser price with its reduced commission but I do not know if it's legit. I just need validation from people if anyone has ever buy their bitcoins from SGitcoin. Probably, I could use FYB-SG to sell my bitcoins though in the future. I wouldn't use mt.gox due to its inconvenient delays and expensive wire transfers. The only exchanges I can sourced out were ecurrencyzone, fyb-sg and sgitcoin.
The 7.9% commission posted on their home page sounds very expensive to the point of being abusive, so IMHO go somewhere else. Nobody I know of charges fees like that, seems crazy. But then it seems that they maybe are including international wire fees and surcharges in their 7.9%... So do the math, maybe it's worth it for a small transfer?
I'm guessing but I'd think it's cheaper to do an international wire straight to an exchange or better yet, see if Okpay has a local funding option in SG and skip the wire fees. The exchanges will then accept Okpay funds at a low fee. From there you don't have to be a day trader - buy your BTC - and then withdraw them to your private wallet (no fee for this). Done. Or you can just withdraw from Okpay immediately at market rates - i actually got lucky once as there was a delay in Okpay and i saved some $$ because the Okpay rate was lagging behind Mt. Gox during a market rally. Be wise and think on your feet.
Otherwise, I use MtGox, BTC-e, Bitstamp, and Okpay and so far they all have been fair and legitimate. I have never heard of the ones you mentioned, just need to study up and pick the best tool for the job. In the end you must make the call since it's your cash.
Regards, Bezzeb