Newbie Maggie question: Best bang for buck?

I know I am destined to buy my first pair of Maggies soon. These will likely be my last “forever” speaker. So I want to get it right - one swing and a home run is what I need. Yet, I have more desires than I have money. Here’s (hear’s) my question:

In general (ahem, in general) as you go up and down the Maggie line, basically (ahem, basically) what changes is the size of the speakers and their drivers. Larger surface area = more moving air = bigger soundstage, etc.

BUT:

Other than size, what is the “sweet spot” in the Magnepan line from a technological / design perspective? In other words, where in the Maggie line can I get the most bang for my buck? Which speaker utilizes the best of Magnepan’s technological refinements, yet keeps the size and cost to a minimum?

Theoretically, if all Megnepans were the same size, which one would provide the best sound at the cheapest cost?

Thanks in advance for your sage like advice!