I just ordered a pair of Cabelas Dry Plus Premium waders for $140. I'm
wondering if I should have gotten the Simms Freestone waders for $150?
My only concern is durability. Will the Simms Freestones last longer
than the Cabelas?

Hard to say. Not all flyshops are in love with Simms products. The
great thing about Cabelas is the customer service. You have problems
with those waders and you will get a replacement pair ASAP. With Simms,
you may wait weeks. Plus, Simms will slop some goop on the surface and
call it done. Do you really want to wait weeks, while the BWOs are
hatching?