i have both "Ballistic: FTE" and "KAC BulletFlight". Hard to say which i like more... depends what your looking for in a program, KAC has some extra features, but it is not quite as ergonomically set up as Ballistic FTE, which is really easy to operate, and has been extremely accurate for me.
I would go with Ballistic FTE, and forget about the Bulletflight, however Bulletflight does have Bryan Litz's G7 values saved into it, if that's important to you.
Let me know if you have any more questions, i'd be glad to help, have been tinkering with these programs for a long time.