For instance, the Croix-de-fer 10/20/30 are all steel frame/fork combos.
I've now had a play on a genesis croix de fer. Aside from ongoing uncertainty over L vs XL (bike fitting at LBS thinks either would work, tradeoff between faster on the L / more comfortable on the XL) I think I'm sold on it.
The cable disks on the 20 I rode on were either badly set up or just much weaker than I'm used to (saint). This pushes me towards hydraulic disks so I need to choose between frame & components or the 30. I'm leaning towards the latter as generally less bother.
Thank you all for your input, it's really appreciated.