In reply to Gills:
Personally, I'd recommend a pair of half ropes for trad. It's fine for 2 seconds to follow on a rope each, providing that the route is going more or less straight up (a long traverse could mean enormous pendules if things go pear shaped, also, watch out for routes with a lot of rope-slicing sharp rock edges - 2 ropes are a real advantage here, but I wouldn't like to follow on a single half rope!
Have you belayed a leader on a pair of half ropes? It is a bit more tricky than a single - but once you get the hang of it, it's not too difficult to take in on one rope while giving slack on the other (you need to do this as the leader climbs up to some gear that's been placed overhead on one of the ropes).
I now use skinny (8.1mm) half ropes as it is less weight to carry, but I'd go for something thicker to start with. Also, for climbing in this country, 50m is ample. As for which brand, I don't know, I've been happy with my Beal ropes, but I'd go for the cheapest if I were you.