What heart rate monitor should I buy?

aquasw16

I am looking to a buy a heart rate monitor that isnt really expensive (would love to spend less than 100 on my first one).

I would like it to have the following capabilities (and be one that is very effective, proven by your loss!)
-Tell me how many calories I have burned throughout the day and exercise
-Are there any that can tell how many I have consumed? That seems a little weird to me, but I have heard that there are some that do that?

Thanks for your suggestions!