From what I have been reading, the bags from Wilserbrewer are of super quality. If you are going to BIAB (that's what they are designed for), I would highly recommend them.
For straining wine gunk, cheaper the better, IMHO. Paint strainer bags, muslin, cheese cloth, a sheet of cheesecloth in a colander, some folks have even used pantie hose (new, of course, lol - Well... I hope anyway!). Sanitize, etc..
I like to toss the bag for every batch so cheap counts. For less than a buck a piece, I don't even think of washing them. BIAB needs to support many more lbs and is a bit more important to fit your kettle than in the wine world.
Just some thoughts.