I endorse this plan B also, since I didn't think to use the 79 trick.
Skipping something like half of one level is just a huuuuge advantage. I mean that too, non-sarcastically non-ironically. As you work from 79-80 you find that most quests pay out 22050xp for the turn-in alone. That's somewhere between 1/4 and 1/2 of a bubble (so 1/80 or 1/40 of a level).
25 turn-ins might not get you half of a level, but I'd clearly rather have it than not have it.
So, next payday I've gotta sign up for the digital upgrade! (canceled my gamestop pre-order)