We're stopping over in Bangkok for the 1st time on our way to Koh Samui, we'll be there 2 nights. I've read a lot of reviews here and on Tripadvisor, but am having a hard time deciding between the Millenium Hilton and the Conrad. Has anyone stayed at both and recommend one over another? It's a fairly quick trip. We'll get in late, tour most of the next day, probably spend the evening at or around the hotel, then fly out the next day after a little more touring.... We're Diamond members, so we're looking forward to a room upgrade and breakfast. Thank you!