I'll just get this out up front. I really like gig bags. Truth is, unless there is a compelling reason to use a case, I'll grab a gig bag every time. Here are some of the ones that I've got along with a synopsis of each of them. I'll tell you which ones I use and which ones are only used as the closet keepers.
Fender Stock Gig Bags. I don't have a pic of one of these bags down below. It's the one that you used to get with some of the MIM instruments. I'm not sure they include them anymore. I'll tell you up front that, I guess you could use these as a real gig bag. They'll get your guitar to and from where you're playing so long as you're not banging it around. They offer some protection, but not a whole ton of it. There's a pocket on the front where you can stick a cable and book or something too. Clip-on back pack straps. I have (and use) several of these bags. They keep some of my Strats and Teles in the closet. If one of the guitars that I have stored in them decides to get played out, I move it to a better bag before I head out with it. From a price perspective, I'm pretty sure you could get one of these all day long for under $50.
Parker Stock Gig Bag. No pic of this one either. It's a bit more padded than the Fender stock bag. Outside of that, it's got an extra pocket on the outside that the Fender doesn't have, but feature-wise, they're pretty much the same. It keeps my Parker (P-44) in the closet, but I have also used it when I've traveled with that guitar. I trust it more than I would the Fender bags. Back when Parker was in business, they included this with all of their non-MIA guitars, and, if I remember correctly, you could buy one for around $80. Since Parker isn't making guitars anymore, I have no idea what they would cost if you went looking for one.
Snarf is a wannabe musician who currently resides in the great state of Texas. His wife is his favorite. He believes chocolate milk made from milk that is anything less than whole milk is basically water and deserves to be dumped down the sink so nobody has to suffer through it. He hates having to shop for clothes. But he has a thing for really cool bags, and, consequently, has more gig bags than guitars and a closet full of messenger bags and backpacks. He still misses his dog who was taken by cancer years ago. Check out his Reverb shop and see if he has any gear he's trying to get rid of.