I'm about 165 and ~30% bf.
I'm counting calories by measuring food and logging it. I look up online servings of a particular food and log the corresponding calories.
I use a Garmin, but know that the caloric count is not right (It says I burn about 2500 calories on my ride). My heart rate is usually about 130-135 during these rides. I get the 1000 calories from using a Polar heart rate monitor during my previous workouts. According to this, 2 hours at around 130-135bpm burns about 1000 calories. This seems to be reasonable to me so I use this number.