There has been quite a bit of bad advice in this thread so I wanted to clear a few things up. Genrally all the people here telling you a certain boot is not good, sound as though they have been fitted badly. No boot will fit everyone perfectly that is why there are so many differnt options.
Inportant things are though, you dont have to buy a "freestyle" boot. When I started skiing park we all just used normall boots as that was all we had, and for a long time untill the SPK came out there was not really a boot for freestyle. People say you need full tilts but there just old race boots that happen to be light. So you certainly are not gaining any thing getting a FT, over any other boot.
Fit is the most inportant thing. You are not just going to get a boot either. Getting your foot into a neutral postion is esstential to get a good fit, so a good custom footbed is required. For this you may need to travel to find somebody who is very good at making them. Make sure its somebody who only does them for sking. Ones for shoes are not the same as the support requirments for walking around and skiing are very differnt. The footebed could be the first thing you get, as onceyou have a footbed in the boot you get a much better idea of how a boot will fit long term.
A lot of people here complained about boots packing out which is a symptom of buying boots too big. The shell check is the single most inportant factor in determing foot fitr inside the boot. Also make sure the fitter measures your feet both weighted and unweighted. If he asks you your shoe size leave. A correct fitting boot should be almost uncomfortable in the shop. This is wear allot of fitters fall down. They give in to the customer and go bigger untill the boot is comfy in the shop, but then it will be useless to ski. The reason for this is its alot harder to sell somebody a boot when it hurts in teh shop. But if they are a legit fitter they will explain what will happen as the boot beds in and gets bigger. A good shop will garentee its work too. So if you have issues they should be free of charge to sort out. When I fit my new boots in the summer I can usally manage about 20mins before my feet are completly numb. Now you may think thats bad, but once they bed in and get around a size bigger they fit perfectly. Most people just buy boopts to big as the fitters are lazy and want an easy sale.
Well hopefully that clears a few things up and helps you understand the fitting process a bit more.
Let me know if you have more questions.