Suitable struts for a '90 DeVille?

I've seen catalog solutions ranging from $244 for a complete "SensaTrac" assembly, to $30 or so for Gabriel Guardian struts, and many in-between
choices. I do not wish to do this job more than once in the remaining lifetime of the car.
What would be the most cost-effective solution for a moderately driven Caddy?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.