Which parts should I pick for the ideal reasonable road bike?
The chainrings on this crankset must be made of untempered 6061 aluminum. 7075T6 or T651 is the work of the devil.


This may sound a good idea at first -- it is clear that untempered aluminum is far better material for chainrings than for example bad-tempered aluminum. So a good starting point for an entry-level reasonable road bike.
However, you will obtain an order of magnitude better lifetime from well-tempered aluminum. So if you are looking for a truly ideal reasonable road bike, I recommend selecting well-tempered aluminum for the material.