I'd recommend it. I was grandfathered into the free plan but $11/year seems fair.

Regardless of what you settle on I'd look for the equivalent of http://www.packal.org/workflow/alfred-pinboard for whatever service and platform you use. Being able to instantly search through all fields of all items in your archive is pretty great and has changed the way I work.

Pocket has comprehensive search, which is pretty slick. The tagging feature leaves much to be desired, though it's also far better than Readability.