One reason i did the seed implants is because it also was the easy way out, in my case.
For external radiation procedure i think it was going to be twice a week for 8 or 10 weeks, and i personally didn't wan't that type of procedure, treatment.
So external radiation, can have the same issues, i would think, when all is said and done.
EDIT.
For the seed implants, you go in the hospital in the morning, get it done, and then they kick you out at 5:00 in the afternoon.
Easy, peasy.