Pace University has one of the highest rated Masters in Taxation programs (They are actually ranked #6 in the country) and absolutely outstanding recruitment and career assistance programs as well. I've taken a class there towards my masters in tax and enjoyed my experience but the caveat is that all of their tax program courses are offered only in person in downtown manhattan (brooklyn bridge area is where their campus is)
I have quit the program because I'm working full-time and just can't make that commute so I'm looking to start the degree program again at a school that offers the program all online and with more flexibility. I'm probably going to take the degree at Bentley College, I know several of my coworkers have done it and its online program ranked great for class flexibility but their MST program is definitely not ranked as well as Pace's is. I highly recommend Pace if you can afford it and can manage classes in person.
Bentley is also a very attractive option if you must take the classes online, they offer a MST with a Certificate in Financial Planning without having to take any additional credits. If you want a dual MST and Masters in Financial Planning you can do so with just a few extra credits as well.
Cost for Pace was about $1,000 per credit and I believe Bentley is even more expensive. Quite an expensive affair indeed but I will have to deal with choosing a program and such after I knock out all the CPA exams first
I have been researching the cost of Bentley's program recently and it requires 24 Credits for about $32,000 just for credits. A little bit more for fees and books but thats really nominal compared to the tuition cost per credit. Probably no more than $35,000 tops for the whole program. Pace was $990 per credit when I took a class there in 2012.