I just changed to drop bars on my Trek FX. Also used barend shifters and Tektro V-brake compatible levers. No regrets, it transformed the bike completely. One advise, make sure you test ride the position of bars before you tape them or you will end up removing the tape moving the levers and retaping again (or it is just me?) If you use barend shifters and want to run them all the way under bar tape you will probably need longer cable outers for them. In my case I used two 40-50 cm pieces. Also consider the stem length. I went with one that is bit shorter so hoods end up in about the same place where grips on original bars would be.
If you have any questions, I am happy to help as just went through it all last weekend.

Regards,
Marcin