The one box concept would not necessarily mean one electric cord. Earthquake has done dual cords for years.

The guys are toying with some ideas. There are so many options now. Your idea of 1500's and 1250's is also solid, with the possible change to a 1500-2 for the woofers and a 1250-8 for the mids and tweeters.

The whole idea is it doesn't cost a fortune to get active sound.