Mine is Grand Ballroom, abt 40 - 45 tables. Well, I think MM is rated worth for money, ambience and service is good.. the minus point is a short march in of abt 4 - 5 tables length for the low ceiling grand ballroom and suite is 2 standard rooms combined together. If these are not your main concerns then can go ahead and choose MM. I'm not sure of Hilton, but went to Grand Hyatt for dinner recently. Personally didn't like the food, and friends did comment that it is not good too...
Initally, I wanted to choose Swissotel Raffles cos I really liked their personalized wedding theme, and their ballroom (Padang) but it seems that there are too many hidden cost like LCD rental, only waiver of 1 bottle of wine per table and the best part is that the coordinator is really unfriendly. Thus, I gaf up the idea and settled for MM...