The Eastin grand hotel is just next to eht Surasak BTS station, you can go directy to your room after get off the train.
There is a swimming pool at the 14 floor, you can see the city when swimmping.
The breakfast is good, many choices.
This is a newly opened hotel, very clean. and the receiptionist are all very nice, they speak in English very patiently.
Your good choick in Bangkok