I did the MA- way I totally understand if you feel drawn to it. I felt really hurt if someone suggested I should not take it. Ok here are my 2 cents. MA-s are not cared for nor do the university or professors see them as permanent investments. I was the first to be sent out from classrooms packed with PhD-s. Think about it: nobody guarantees you can take your dream classes with your dream teachers, they have obligation to PhDs. (especially be careful with flexible programs: code word for take what you can we do not care)
Where they let MA students in to grad seminars often I was the only one (MA) who survived the course: I had previous graduate student training and have a thick skin. I had a bigger course load than PhDs because I had to take a certain amount of classes and I took classes with them to show that I can do it.(while they had the option to take less classes) Nobody worried about my study plan or health as they did with PhDs. Because you do not have a 5 year contract it will NOT be the place to discover new areas: in only 2 years you simply do not have time to experiment: one mistake can hurt you a lot. I met a lot of people who gave up the plan to get a PhD because this experience was too much for them. Also I was charged $50 000.
On the plus side I have a nice name on my CV and I took amazing, amazing classes. Later when I applied for PhDs I got the support of several amazing people. Definiely I hoped to stay on to PhD so much as I did not have real safeties and I ended up spending a year out of school. I learned later that an MA sometimes can hurt your file, they put MA applications in a nice (little) separate pile. In best case scenario your new found professors will write stellar letters for you but you are still in that pile: you can only hope that the added value is more than the substraced(but definitely not for big jumps). This fall I will be back to school and I do not feel sad any more that I did not get into top 1 choice.I also made incredible friends and I fully utilized the resources the school offered, joined sport teams, clubs and I spent two very happy years there. If I understand you well you got some nice phD offers with the embracing hands of departments who really want to train you, would make a commitment for five years and would help you in several ways. When people are suggesting to take these offers I doubt they want to hurt you or question your abilities. They just probably have an idea how difficult is grad life without departmental 5 years commitment, in insecuriy even if you are (and why would anybody question this?) really exceptional.