In reply to Will Goldsmith:
If you are planning on doing routes on La Visera (e.g. Biceps) then bear in mind that you pretty much can't retreat after pitch 3 or 4 because it is so steep, and the walk off is straightforward (if a little long!), so doubles are not really required. I think when I did Biceps we took a single 70m, which was more than long enough.
That said, if you're staying for a while, doubles would probably come in useful elsewhere. It depends on whether your trip objective is 'just' Riglos, or you want to combine it with more sport climbing elsewhere.