Kalboz, you have me rethinking my 3 night (first trip to BKK) stay in Nov and the REN. I love the modern feel of the rooms at the Sukh and the lounge / rooftop bar seem superb. I'm a lifetime Plat. Looks like room rates are similar.
Any reason not to stay at the Sukh over the REN? I'll have a driver the entire time so walking to the BTS is not an issue for us.