If I was to stay close to the shopping areas of MBK, and Siam Paragon, and further away from the mongering area of Nana, and Asok.. then I think Rajtaevee ain't a bad choice.
Just checked at Agoda site, and the hotel Siam Swana looks great too. Its near a BTS station for transportation, and pretty much close to both MBK, and Siam Paragon.