First off, congrats on sticking with it and for all the gains you've made since July! I started at the end of July and I've also just reached my first plateau and also decided to take a week off. Freaky, huh? Whether I'm overreaching or not, the break will do me good and rule it out of the equation, so I can start fresh in a week's time.
Plateaus are bound to happen as your body gets used to the training stimulus, hence the need to introduce more complexity into your training as you go on. I agree that the dual factor is a lot more complex than we need for now and there's a lot to explore in between.
There are a number of things we can try next, but no solid information on what's best. This was discussed in my journal a couple of weeks ago, post 265 onwards:
http://www.elitefitness.com/forum/showthread.php?t=413888&page=14&pp=20
To be honest, what's 'best' is going to be individual, so now might be the time to start experimenting to see how we respond to different strategies. I would still rather have a cookie cutter program to follow, but that's just me. The easiest thing would be to step back to the weights we used three or four weeks ago and ramp up again.
I haven't decided exactly what I'll do after the week off, but I tried doing triples on deadlifts this week and quite liked it, so I think I'll stick with them. Whether that's a good strategy for making gains remains to be seen.
Let us know what you try and how it works for you. This is very interesting for me and I'm sure for a lot of people following the single factor.