I did the same thing when my daughter was born. After being 280 for 10 years, I knew it was time for a change (I am 5'9"). All those years of grinding and a list of injuries a mile long, I knew I couldn't keep it up.
I am now around 235 and I feel fantastic. Of course, 500 on the bench would crush me now, but I could give two shits less. Longevity is your friend.
-Kim