Oh hey, I'm all about some good sourdough and rye myself.
But you don't really have those for breakfast. Not exactly the same thing as a good, chewy sourdough or strong flavored rye/pumpernickel.
A loaf of brioche will run around $10/1lb loaf. (Little more or less depending)
But it's really a breakfast bread...kinda like an adult pop tart for breakfast. It tastes of eggs and butter and is really flaky when toasted. The jam or Nutella just helps it go down.
Sourdough takes time to make from the starter but brioche requires 2 days minimum to come out well. The butter needs to be cold to bake in right.