GMAT Prep -680 (Q:48, V:34)

I've given the gmat prep-I today and scored 680 (Q:48, V:34). I haven't booked a date yet, but, planning to book one in the first week of Jan. I'm aiming for a score of 720. I've been seriously preparing for the last 4 months for about 20 hours/week with about 90% of the time spent on the verbal section.

After doing a self assessment on the verbal section, I tend to spend too much time on the RC passages and this seem to hurt on my ability to answer SC and CR questions particularly in the latter part of the section. I had like 25 minutes to answer the last 20 questions and 10 minutes to answer last 10. Pacing needs to be improved. Guys, it is important to pace yourself or all the tricks/concepts/stratergies you learned will be thrown to winds.

Any recommendations on RC materials for practice, other than OG11 and supplements? Thanks.