Keep in mind that the 1911 is only the platform and that the 1911 comes in more than 45acp.
Para makes a nice 1911 in 9mm called the Para18-9.
Holds 18 rounds of 9mm and is a decked out 1911. Some day I will have one because I like 1911s and 9mm. If 45acp were as cheap as 9mm I'd shoot it instead. But where I'm at I can get 2.5 boxes of 9 for the cost of 1 45.
Para18-9 gives me the best of both worlds.