I'm looking for a bike to be my fun, middle aged, do everything for a long time bike. Problem is, it doesn't *seem* to exist as a set product, even kind of close. Know of something like this or have tips for having one built up (like frameset to start with, etc.)? Thanks very much!

What I'm after:

Monster cross steel frame with space for tires up to 2 inches, *maybe* 3 inches plus full fenders
-- I don't really know what monster cross means, what I mean is a steel cyclocross frame with room for big tires
Alfine 8 hub
Brifters
Drop bars
Conventional chain, with full chain case (like Dutch style, enclose the chain from the elements, maybe/probably added post-market)
or carbon belt drive (2nd choice)
Good disc brakes
Good wheelset

plus the rest, including big street tires (2-3 inches), full fenders, etc

I could handle spending $1500 USD on such a wonderful bike

Like I said, I can't seem to find sometime really even close to that as a standard product. Weird. Maybe I'm missing something? Maybe I'll have to make some compromises? Maybe it will mean a custom build?

I'd be using this mostly for year round (that is, winter) commuting in Chicago, 2-24 miles a day. Plus some group cyclocross practice and a local cyclocross race or two a year. The occasional long ride. Maybe a gravel race.

I'm open to suggestions for alternatives to the ideas above.

*But*, can't/won't do a Nexus internal gear hub (had one die on my bakfiets after three years; a lot of plastic in there). Not a NuVinci n360 (put that on my bakfiets, seems really solid, but I want brifters and to be able to drop the whole range in one hand motion).

For brifters, that somehow seems a tall order for an IGH. I could think about bar end shifters, but maybe not happily.

The chain case or carbon belt drive is about reducing my hassle of dealing with pants legs every time I ride and to keep maintenance, especially from winter riding, to a minimum, so I'm wed to one of those even if they're ugly/lose some efficiency.

For the frame, I somehow just don't like aluminum, and I don't want any carbon fiber on a frame designed to be a long-term tank. So I'm wed to steel.