I'm glad that you like them so much! For some reason I had neglected to mention their incredible bass for their size, but it really gets one's attention, doesn't it? The other speakers discussed in this thread (e.g. A1b, CBM-170 SE) can't match it in this regard.
That said, I'd still recommend using a subwoofer for movies, unless you simply do not want really DEEP bass. A sub would also relieve your speakers and receiver of a heavy burden, which could help maintain sound quality during challenging scenes. If you elect not to use a sub, then I would recommend setting your speakers to Small, your subwoofer setting to Yes (i.e. there is a subwoofer), and crossing the speakers over to the nonexistent sub at, say, 40-50 Hz. This will act as a high-pass filter that protects your speakers from strong LFE in the 20-40 Hz range, just in case.
That's a good observation--I much prefer to have as level a front soundstage as possible, myself.