In reply to Simon Caldwell:
Well thanks to everyone for their advice, we had a splendid time.
In case anyone else has the same query in future, it sounds like the answer is to get the new English guidebook.
Sadly we couldn't get a copy. Balmat had had half a dozen but were sold out. Altair had loads of guides but not this one. Likewise the shop in the Monastery (incidentally, the Monastery also sells the decent map, other previous threads suggest that it used not to).
Of the ones we tried, my old Gorros guide was pretty good, for an old-fashioned style book. There's been at least one updated edition since then. Nowhere had a new version so it could well be out of print at the moment. The main problem we had was that many routes have been rebolted with new belay positions since it was published. So a 110m 4-pitch route requiring 6 quickdraws is now a 58m single pitch requiring 16; and a 4 pitch requiring 8 quickdraws is now 3 pitches requiring 15.
The Sant Benet book was pretty hopeless, with hard-to-use line topos, no clue as to quality/quantity of protection, and text solely in Catalan. This might be why we saw just two other teams climbing there all week, while Gorros was relatively busy.
We also got a Desnivel guide to the northern crags, on the basis that the text was Spanish so our dictionary might help. But it turned out that 95% of routes were aid routes, so not much use to us. Shame so many guides get wrapped in cellophane so you can browse before buying.
A 70m single rope was fine for everything we did, but 60m doubles would have made some of the descents easier.
Grades were horribly inconsistent. Gorros routes all seemed reasonable (and consistent) at the grade (based on a total of 18 pitches). Elsewhere, less so, but it may just have been the routes we chose.
Gomez-Xalmet (excluding the aid pitch) is graded 5a. We reckoned tough 5c.
Cavall Bernat Normal route is graded 4, 4+ for the main pitches. We reckoned 5c for both.
Both brilliant routes though, thanks Chris for recommending them.
Based on these two, crack routes seem to be bolted on the assumption that you'll also take trad gear. One of the local blogs says as much. But Chris Craggs disagrees and he's got slightly more experience than we have