Hmmm. Why is EVERYTHING getting smaller?!
From washing machines, to refrigerators to - now - ovens. The only answer that I can personally come up with is the pressure from environmental groups. They're pressuring for lower energy consumption, but instead of actually improving the energy consumption, manufacturers just reduce the size thereby reducing energy. That's NOT a good answer. It only makes for more work (and energy consumption) for us in the end.
If I could do two loads of laundry all at once with a bigger machine, it would cost less (energy wise) than having to run another machine twice!
Sorry about that. I just get annoyed.
I agree with CharlieD on also checking the size of what is allotted to you in your home just to be sure. I also would get the biggest that would fit too.