Ergott's winter setup is sublime, you could move out to the wet coast and fit right in!! I am in the queue with Breadwinner for a new B-Road and will have a very similar setup, and my winter wheels will be HED Belgium+ on CK R45 hubs. Having disc brakes on a winter bike really does simplify some issues with respect to rim wear.
For non-disc winter setups, it really comes down to how much rain and how much salt will there be in the area. I live in the Greater Vancouver area, like Tony M now does and here we get a lot of rain and if there are stretches of snow like last winter, a lot of salt. In fact the municipalities have kind of lost the plot on road salt the past few winters. I have seen the fools in the City of Surrey and Township of Langley spraying the road when the temps are below freezing and we are in Arctic air with humidity down around 25%. Guess what? There's no moisture to make frost or ice on the road at this combo! I have noticed with the increase in salt usage the past few years I have an increase in the destruction of components as well
. Anyway without further digression, I have been riding rim-brake winter bikes in these conditions for the past 17 years and I have my own opinions on what setups work best:
1) Handbuilt wheels are better than package wheels (Eurus, Ksyrium etc) because one can easily replace a rim using the existing hub and spokes combo.
2) Choose a rim that is relatively low profile, because the deeper the wheel the more water it sucks up in the section and makes the heavy winter bike ride even slower than it already does in the dry.
3) Cup and cone hubs are generally the best. It's unfortunate that Campy only makes Record in 32f/32r and Shimano only has non-32/32 combos in Dura-Ace. I'd love to get some 24/28 Ultegra hubs for example. King R45 are nice hubs and fully serviceable but my experience is that they require a bit more maintenance than I initially thought they would riding in the winter. DT 240s are sealed pretty well and if one is careful with bike washing and not hitting them with high pressure (big no-no) then they will fare quite well.
4) Brass nipples. End of story. Even better, brass DT Pro-Lock or Sapim Secure Lock nipples because the coating will help fight the corrosion. Absolutely stay away from alloy nipples and if using regular brass nipples I think silver is better than black from a binding/corrosion standpoint.