You need to check with whomever will be making your chip! Like I said above, I am sure you pay extra for the MOM caps. Is your company, professor, or department willing to pay for the extra stuff or do you get the default. (If you are a mini ASIC run you have to do what everone else is doing... So you don't have a choice, just find out what you can and can not use. You need to check with whomever is making your chip to see what you have available. It is in your PDK docs or your boss will know. If this is just a project for school which will not be manufactured just use the MIM caps.
Jgk