I don't use fixed power scopes often, I've just always used variable power scopes and like the flexibility. I feel handicapped with a fixed power after using variables for almost 40 years. Plenty of people do use them and love them. If it's your thing, or you want to give it a try, great. Give it a shot!
Like the others have said, SWFA makes great scopes and Joe will be the first to tell you their warranty and build quality is up there as one of the best. The owner is also a great guy and is in the process of making a reticle that's air gunner friendly and had features we look for. That's pretty awesome and should be commended too.
With all of that being said, I don't necessarily think you need to buy a fixed power scope because it's "more durable" or has "better image quality". If you buy a quality scope, it should be plenty durable regardless of magnification choice and also be very clear. I have plenty of variables that have better image quality than most fixed power scopes. Of course it all boils down to what you're willing to pay and the manufacturer you're buying from. Some are obviously better than others and at a certain point, there's a diminishing return on the money you're spending. Does anyone really need 99.999% light transmission for an additional $1500? Probably not! LOL
Again, Joe will be the first to tell you that with scopes, you get what you pay for and if you pay good money, the image quality, crispness, tracking, durability and warranty will be there. SWFA is certainly a good one if you decide to go with a fixed power OR variable for that matter!
Good luck with your choice. Let us know what you decide to do.
Stoti