Wrong forum. Post this in the draft advise forum and people would be happier to answer your question there. Just some friendly advice.
To answer your question, though, I would neither avoid nor seek out that pairing. Take the best guy available at each draft position. There is no sense in going out of your way to acquire a tandem, but if it happens to work out that way, so be it. They should both put up spectacular numbers this year and if you are underwhelmed by the remaining RB talent then you wont regret having those two guys.
The problem with passing an RB in both the first and second rounds is that by the time you pick in the 3rd and 4th round, you will have even lesser RB to choose from so you will be stuck loading up on RB prospects all throughout the draft in order to help avoid a desperate RB situation. This means you pass up on quality players at WR in particular. Your WR corps will probably be insanely weak.
This is why it's good to mock draft a lot to try out different scenarios.