I booked Wangz. (jpatokal, I didn't see your post before I booked)
I have to admit, although the Fullerton is a gorgeous building, I just didn't like any of the pictures I was seeing of the rooms. Wangz seemed to promise the better hotel experience.
The big hurdle for me was the distance between Wangz and, well, everything. However, I'm a big walker (at least a few hours every day), so I figured that it wouldn't be too bad. I'll make a trip report and let everyone know how I felt.
Thanks for your help!