Your are absolutely correct. In fact, I even used FE and MyTown for a while. They work great.
However, i switched to MCPC+ with bukkit plugins for a few reasons. The first is performance; MCPC+ has done amazing things. Players can now be in mutiple dimensions at once, i could increased server view/ render distance by 100%, exploration generating new chunks, dynmap, etc, with no lag. Before MCPC+ the server would have given us the finger and rolled over and died. Now, barely a hiccup.
The second reasons is that none of our players particularly like protection mods. There is no protection on the server. Hence the need for a very good player logger. Prism was the only plugin that works well with FTB, and it required BF or MCPC+. FE's logger is not up to scratch with logging everything, and its mysql data presentation is confusing for non-admin players to sift through. Now we have a web-ui for the player logger with excellent data presentation. If a player has questions, it is very easy to look it up.
Therfore, MCPC+ and Prism was the natural choice for our server if you dont really want protection. If you do want protection, then yeah, MyTown is brilliant