Okay, here is my 2 cents.

As with Tianci, I'm sure that the skysport and 6EXA does NOT come with rechargeables in Hong Kong. The older 6XAS did (but was also more expensive). I'm sure Thailand isn't very different. As for the price, I agree that the states is cheaper for radios. I think my 6XAS was around $190, which was a pretty good deal.

Charging NiCads - I recommend that you cycle them because they do get memory effect still. I cycle my packs often and keep a voltspy on each and every plane (rather than depending on "feeling", which incidentally was proven lacking when I plowed my 3D Cap232 just as I was pulling up to come in for a roaring low pass). Furthermore I agree with piper chuck in that you should really try to spring for NiMh if you can. The memory effect is much less apparent and they are lighter. Question: what is this four battery thing? You bought four packs or four batteries? If you bought four single rechargeable batteries please just go to another hobby store... the one you go to sucks. Definitely buy assembled packs. If you only bought a four battery pack for the RX then it's acceptable. But remember if you are flying electrics, you don't need the RX pack at all. As for the TX, there should be slots for 8 individual AA batteries. You can buy these batteries ANYWHERE. You need not buy them from your hobby store. You can shop around and get a better deal. Once again, NiMH can easily be purchased from local hypermarts and such. These general purpose batteries are good for both TX and RX but not for electric flight.

Charger - there's nothing wrong with the charger you said. Sure there are other general chargers but for the beginner, a wall wart isn't a bad idea. I use a computer charger because I also fly electrics. That allows me to cycle my batteries once every few days of flying. Tianci's idea of wiring up light bulbs is a way that most people use in the states for cycling r/c car batteries and works as good as the fanciest of chargers.

Anyway, there are a bunch of hobby shops in BKK, I don't know why you would be limited to just one. In fact, I know that many of there is a hobby store on line at http://www.minicrafthobby.com. Address 11/6 Hatairadih rd., Minburi, Bangkok 10510 Thailand. A friend I met a few months ago goes there and I'm sure they will serve you well.