I have stayed at the Marquis, Suk 57 and Renaissance.
Whilst I liked the Renaissance, I woudl not go back there as the pool is indoors. I like to spend the afternoons sitting by the pool with food and drink readily available. The pools and pool bars at the Suk 57 and Marquis are equally good, although the lack of shade at the Marquis can be an annoyance.
So far as lounges go, the Marquis wins hands down. The lounge at Suk 57 is good but it is far too small for the number of guests and can get uncomfortably crowded very quickly. The lounge at the Marquis is far bigger and I have never seen it anywhere near busy.
You pays your money and you takes your choice but for me it has to be the Marquis.