I've used silk plants from a variety of manufacturers. While I didn't have any fin issues, quality was another thing.
Tetra Water Wonders - best quality silk plant that I've used. It's been in a tank for 6 months now and it still looks good. It's also nice that they're based on "real" plants and not on fantasy. Pricey, but you get what you pay for.
Petsmart "Top Fin" budget brand - nice looking but of inferior quality. It started to shred after a couple months and I had to throw it out. No wonder they're so cheap!
Colorburst Florals by Blue Ribbon - Really nice looking plants - full and bushy and the colours pop nicely. They aren't realistic in that they aren't something that grows in real life. However if you don't care about that, in my experience they are a good buy. I had them in various tanks and they fared well. Not as high-quality as Water Works, but nowhere near inferior like Top Fin. They are mid-ranged priced, but you do get a lot in a package.
Hope that helps! :)