How many calories ... in a slice of Pecan Pie?

I've never been a huge pie fan, except for one particular type of pie -- pecan pie. It's perfectly sweetened and gloriously rich, and it's difficult for me to turn down when offered. Pumpkin, apple, huckleberry -- those pies I can pass up. But not pecan. It's too delicious. But I realized that while I know approximate calorie counts for many things, I had no idea what a slice of pecan pie would set me back. I figured it must be somewhat healthy because, well, it has nuts and nuts are good for you, right? Anyway, let's see what's in a (small) slice of pecan pie. Is it:

A) 250 cal, 28 g of fat
B) 503 cal, 27 g of fat
C) 188 cal, 36 g of fat
D) 650 cal, 18 g of fatThe answer is B) 503 cal and 27 g of fat. That's a bit scary -- my entire dinner sometimes doesn't meet those proportions. What's more, there doesn't seem to be many ways to reduce the calories count. You could use a non-calorie sweetener instead of sugar, but how do you cut the fat? What's worse, I usually have pecan pie with a small scoop of ice cream -- yikes!

I'm curious -- do you know of any low-fat versions of Pecan Pie?