Leeds,
Don't trust any hair transplant association. It's not like the medical boards or something, any doctor can perfom hair transplants, so just keep that in mind. Stay around these boards long enough and you'll get the picture of which docs are doing the best work on a consistent basis.
Many people use minoxidil and finasteride in conjunction with transplants to strengthen the hair they have, and to grow some hair back if possible. It's one of those things where you want to try and keep as much of your hair as possible, since you will continue to lose hair after a transplant in all likelihood. The meds will slow things down at the very least, and hopefully save some of the hair on top of your head that you might otherwise lose.