@colleenscott I have had two TKRs done by different doctors.
The first and most important consideration is making sure you have the very best possible surgeon you can find.

That being done, have you considered a Conformis knee? My second TKR was with a Conformis knee and I have been very pleased with it. They actually take images of your knee and make the replacement knee to mimic it so the recovery is easier. I was fortunate because I live in southern NH and the developer of the knee is in Boston so I was able to have my surgery with him. If you happen to be in this area, he's wonderful. His name is Dr. Wolfgang Fitz.

I too have good things about the computer-assisted knee replacements though. They use a Stryker knee. I presume the model they use is excellent. I know that past Stryker knees have had some problems.

I have no idea what my first knee was. Back then I never even knew that was a consideration. I was very uninformed.
JK