In reply to alexalex81:
Just give up on any effort to minimise the number of ropes you own. It's a completely pointless and silly idea.
Assuming that you have no intentions of voluntarily giving up climbing, over the next decade or so it will make no real difference in terms of cost whether you own ten ropes or two. Buy the best options for the climbing you intend to do.
You're list sounds pretty much spot on. The first three are EXACTLY mirrored in what I own:
- 60m x 9.8mm sport rope (general UK sport climbing)
- Pair 50m x 8.5mm dry half ropes (general UK trad, sea cliffs and multipitch)
- Pair 60m x 7.5mm dry half ropes (personal snow/ice climbing)
I haven't done much Alpine stuff for years but for mountaineering stuff, both instructing/guiding and personal, I'm a big fan of the latest thin singles so have:
- Pair 60m x 8.7mm dry singles (as a pair for guiding in Winter, or singly for mountaineering.)
- Pair 40m x 8.7mm dry singles (as a pair instructing or singly for general mountaineering/scrambling Summer and Winter)
Finally, as mentioned by another poster you can't beat having a short (25-40metre) fairly substantial single either bought specifically or cut down from a previous sport rope:
- 27m x 9.8mm single (indoor use, gritstone and outcrop climbing)