HI Xiaopei
My situation was exactly like yours when I was choosing my venue.
Grand Hyatt- the grandballroom has pillars and it looks old.
Meritus Mandarin- likewise the require min tables which is more than my expected guest list.
Merchant Court- wonderful ballroom and nice reception area which is enclosed for the couple's function. With perks like wat Wendy had, thus I decided to pick this.
I also considered other hotels like:-
Marriot- ballroom looks small best suited for 40 tables coz certain corners of the ballroom is blocked from the screen
Hilton- for 50 tables, the march in is very short
Grand Corporthne Waterfront- Best Ballroom in town. Simply very grand! But inconvenient for my guests.
Pan Pacific- wonderful ballroom 2 but due to the road wks at marina area, I was discouraged to host my dinner there at the meantime. Many ppl experienced traffic jam.
Marina Mandarin- newly renovated. same problem as Pan Pac.
Basically the above ballrooms are those tt host 45-50 tables. Hope tt helps!
Cheers