Thank you all! I guess I will be staying at the Millennium.
Never stayed at the river, so it's a first for me too. But I do love the icon siam (and the big terrace there) and the river boats.
With the 25% off for members I think I will still have a drink at the loft maybe or the afternoon tea. Had a lot of afternoon teas in bangkok and a lot of them where super great (Anantara, Kempinski Sindhorn and the Okura). Hopefully the WA can compare.