It is determined by your preference.For me, it is convenient to wear contact lenses with regular sunglasses. I am not used to wear sunglasses indoors, after I take off prescription sunglasses, I will be nearly blinded. If I wear contact lenses, I can take off the sunglasses whenever I want to take them off. lol.
Personally, I would choose contact lenses with regular sunglasses because it is convenient. If you go indoors, you can take off your sunglasses and you still can see clearly.If you go outdoors, just put on your sunglasses which will protect your eyes. If your prescription changes, you can go to have your contact lenses replaced so that you don't have to buy a new pair of sunglasses.