Webflow + DPD (digital downloads), or Webflow + Shopify (physical goods) If your CMS is not supposed to do anything particularly fancy and if you don't want the annoyance of dealing with techy staff, Webflow is currently the best website builder that I know. It's a visual tool and that saves you lots of time, especially if you are tech savvy. They are just releasing a CMS API that is going to make it even more flexible.

If you are selling real goods, Webflow integrates with Shopify very efficiently. If you are selling digital downloads, I'd consider DPD, which is in many ways better for digital downloads since it was born just for to do that. I am currently using it and I am very satisfied.