Glad to hear you finally found one. If you can afford it and have the room, I'd keep both. Best of both worlds, like you said the boat is already beat up so you'll be able to get even farther in the shallows and to fishing spots others paddle to. Use the prop for the lakes for longer runs and heavy chop.
If nothing else keep the Fisher long enough to learn how to run a jet and learn how shallow it will run and what they are capable of. If you haven't run or dealt with jets much it is best to start off with a beat up hull anyway. If you hit something, no big loss.
Keep us updated, have fun with it.