Punk, it would probably help if you would clarify a few things.
1. Do you want someone to look at a single chapter and tell you which version to go with? Or do you want someone to read the existing 5 chapters, help you with decisions on chapter 6, and stick with it as you write the remaining ~80,000 (or however many) words of this novel? If the latter, then you'll probably want to give your potential beta-readers an approximate timeline, so that they know whether it's a commitment they can make and keep. (If the former, normally I'd suggest getting involved here and posting it in Share Your Work, but the AW workshop disallows fanfic so that's not an option for you.)
2. Are you looking for overarching plot/structure feedback, or general 'would you read further' feedback, or grammar + spelling + punctuation + sentence structure feedback, or dialogue + point-of-view + characterisation feedback? Different readers have different strengths and weaknesses.
3. What are your intentions for this book once it's finished? You mentioned it has fanfic elements, which means that legally it is unpublishable.
4. How do you handle feedback? Do you want lots of praise and very kind, mild criticisms, or do you want someone to rip into your prose until it hemorrhages red ink? Do you want beta readers to offer suggestions for how to fix potential problems, or just to point out bits that confused them?