Hi Eric,
I cannot comment on what you should do with your Roth accounts, but here are my two cents about the current market:
When you look at the big picture this last drop is still quite small. Why would you make a rash decision and abandon your plans for something that so far hasn't been a big event? If it turns out to be a small correction and prices quickly recover, you won't have missed a huge opportunity. If it turns out to be a major correction, there'll be even better market conditions to take advantage of a bit later.
It's not market timing that I'm advocating here, quite on the contrary: If you think you'd like to do a little market timing (as it seems to be the case), why not wait for conditions that are very obviously favorable? Why not revisit this question right before you're ready to contribute to your Roth accounts, or if you see a really big market correction, whichever happens first?