Having run over 71,000 miles over the past 34 yrs and having used many (too many hr monitors and GPS watches) I think the Garmin FR 110 will fit the bill for you. As far as calorie expenditure the watch goes a little further than most other models. It factors age/height/weight and activity level. (There is a chart that shows your activity level based on the number of hours you exercise a week). Having averaged between 40-50 miles of running per week for over 3 decades, weight gain has not been an issue. 5'10' 145-150 lbs, age 67. My motto: Exercise for fitness:EAT foor diet. Nick
'09 128 BSM-Taupe/AT("Snoppy") my wife's.
'09 135 CR-Taupe/MT/BMW Performance Exhaust("Red Baron") my bad boy. Peacefully sharing the same garage.