Years ago, I had a 520SBK. I sold it because I just don’t dig or particularly need serrations, and, like we tend to do, flipped it to pursue other knives that struck my fancy at that moment. Sellers remorse, yadda, yadda, yadda. Then it got all discontinued. Other knives came along, but over time I wanted another 520.
Fast forward to earlier this year, and I ended up buying a 570, hoping it was close enough to the 520 to fill the void. For me, it is not. I still have it, and do really like it. Its definitely, without a doubt, a durable, biggish tank of a knife with great action. I found myself still longing for the slightly smaller profile and overall feel of the earlier Pardue design. Thanks to this site, I recently found a killer deal on a 5000 auto in great shape, so, as of just a couple days ago, I’m back in the 520 saddle again.
I’ll keep the 570 as well, or not. We knife guys can be fickle. Lol