Yeah, I changed it too last week. Clunks and shifting difficulty were the indicators in my case too. I chose the 987 one. My car is quiet now (I think...).
My life is a mess nowadays so I did it in a repair shop (I was doing the bearings anyway, so what the heck throw in some more $$$
). If you ask them they can check it visually and tell you how bad it looks (the truth is I couldn't see much but they saw that it wasn't too bad, yet broken. $226 from pelican. $300-400 from the mechanic, $100-150 from pedro... the choice is all yours, but it is one of the (many) repairs you will enjoy