Hi, I am looking to stay 4 nights in Singapore next August. I am visiting for the first time and intend to do the usual touristy stuff, but will be working the first night as I will be landing Friday night (Friday morning US time). I was looking at the following options, which look to be roughly in the same price point of ~$300-400 USD per night. Does anyone have any opinions on which are the best of the bunch, or other recommendations at the same price point?

JW Marriott South Beach
Conrad (both of them)
Andaz
Swissotel Stamford
Sofitel City Centre
Fullerton
Artyzen
Intercontinental (the main one, not the Robertson Quay one)
Shangri-la

I am a primarily US traveler and have Titanium status with Marriott, Gold with Hilton, and Platinum with IHG