Could anyone please recommend any fabulous day/hotel spas in BKK? I am considering the spas at either Banyan Tree, CHI Spa at Shangri-La or The Oriental, but haven't (and couldn't) made up my mind yet. I am planning on getting a 4 hr or so treatment package, which I'm sure would be delightful after an almost 24hr trip from NYC.

Any suggestions are greatly appreciated.