My alt is GEO/COR only, I'm not hurting for inventory space just yet. The main limiting factors are the 1 cape/month limit and my motivation to bother with Ambuscade on any given month, and she's only two capes in on COR right now. Might condense Req into a MND/acc/curepot cape or something along those lines depending on how much I care 5-6 months from now.
Now that I think about it, I'd probably rate dex/acc/DW+10 cape higher priority than req cape and one of the more useful cape as well. And here is why:
1) If you /DNC for steps/ja a lot, DW+10 back is incredibly useful for samba down tp set.
2) It's also useful for slow, dispel, death and lose buff etc.
3) Depending on your setup, sometimes magic haste just isn't capped. For example, setup that relies on MG or entrust haste for magic haste.
I think DW+10 cape is kinda gear that it doesn't feel useful on paper, but once you have it you'd start to rely on it a lot more than expected.