I feel that if your health will benefit and you will get the chance to do new things, then by all means go for it. I have had friends who had breast reductions and they were never so happy...and relieved!
On another note, I feel that implants can be ok. None of my friends got implants to go bigger, but one got augmented because of a huge difference in size between the two. I don't exactly approve of going out and getting really big knockers but hey, it's not my decision to make.