I'm inclined to say learning more about physical chem is probably a better use of time, however, than qualitative MO.
Particularly if what you're looking for is justifications based on first principals.
And working through a decent textbook on pchem is really a necessary prerequisite for much advanced chemistry, and much easier than tackling quantum chem on a deep level.
I like McQuarrie's textbook, personally. Fleming also has a good pchem book.
Actually, scratch that last bit, it's not Fleming I'm thinking of, it's Atkins.