I've been in Rx sunglasses for several years. Trying to find one that my optometrist can "install" my no-line bifocal Rx has been a challenge. Most frames are too small for a comfortable fit. Then you have to be careful if the lens is too wrapped which won't work with bifocals. If your going to change to a Rx no need to invest in the polorized version. Go with the basic model.
The lens they arrive with will be removed and set aside anyway. I'd highly recommend having your optical store add the polorized feature to your new shades.
Finally, super comfortable, looks great and my optometrist confirmed that I've made a good choice based on the products construction.