Prominence,I am not really qualified to give you an experienced answer.I'm not in medical school,but I may be able to give you some small details about your question from what I have learned through the words of others.However,again,I am not a physician so I think you'd best get another opinion.
http://icpac.indiana.edu
Anestheisiology-
*National Average is about $131,000 for the USA,but I've heard of many making alot more.
* I am not sure of hours,but I'm guessing 50 to 60 hours a week would be the average.Only an uneducated guess.
*Stress varies alot and again,I don't know for certain
Child Psych-
*Average is bout $115,000 for general ( child...? )
*I've heard that critical inpatient physicians can work 70 hrs. while some in lighter or outpatient clinics work about 40 ( not including on call)
*Again,stress is a toughie.How do you feel about kids telling you their problems all day ?
PM & R-
*Don't know.Some say about $155,000
*Hours can be about the same.PM&R is considered generally lighter,especially in residency and apparently stands for " Plenty of Money & Relaxation ".
*Again,stress in not totally predictable but with usually light hours,I'd say it's less than most
Well,sorry I couldn't provide you with much more than heresay and afew statistics from the link I mentioned.However,there experienced and helpful people in these forums ( have u tried the Lounge and Everyone forums ? ) and I wish you the best of luck in what ever you decide !