Once you know all there is to know (or most anyway), then make a decision. "Any other stuff to consider?" makes me think that you are new to this idea, which means it's not the time to spend your money or make a commitment to a plan. Nick has offered the best answer here so far. Read a lot on this site. There are many many troubled threads that start out, "I just completed my TT swap, and it doesn't work. ...." You will also read opinions about the ablsolutely worthless "guarantee" that comes with it. Use "search" to find information on this topic. You'll find lots of opinions that say, "sell your NA and buy a TT".