I'm certainly not a fisheries biologist but I think if I had the opportunity to start fresh with a 43.5 acre pond, I would do it. Especially if Greg Grimes was managing it.
One thought. Even though you will start out with no undesirable fish, the Green Sunfish and Bullheads will get back in. Also, some well meaning type will put some crappie in. However, with a good predator prey balance before that happens, the effect should be minimized. With proper management, you could have those 10 pound bass back in a relatively short time.