For a simple dungeon crawler, I don't think so (although you're going to have a problem with 3D sound).
If you want to do a Doom/Quake style dungeon crawler yes it can be very useful... but so your map editor will not be of much use to you because this engine can import Quake 3 levels (and therefore all map editors that export in this format).
In fact, with SGE you have access to almost all the features of Irrlicht and irrklang.
Anyway, good job Steinbock, hope you will keep us posted on the progress of your project which looks great
