In reply to chimpers: I think the two workhorse ropes that are cited regularly in answer to your question are the edelrid python and the mammut vertex. Not saying that they are the only options but you might want to have a look at them.
I have been using a vertex for 2 years and except for the crappy colour, I can only recommend them (some people find them a bit slippery though, so it's good to have a proper look before buying).
