Denver is a big city but from everything I know its economy is more boom bust oriented than San Diego. Its also very Arid. The mountains are gorgeous, but are just like the beach. If you don’t take advantage of them, you are living in Kansas next to them (A high dry plane with unpredictable weather).
Colorado Springs is home to angry Jesus (focus on the family), but its got its fair share of open minded folks too. Houses are cheaper, salaries are lower.
Even though my ex swore up and down that the Mexican food was better there, I think she’s full of it.