I'm no expert on FFR's but I think they made a non donor FFR replica that did not utilze Mustang II suspension. I would choose FFR in your price range based on my viewing of the market. Midstates is another choice but I think they may be more and I think they use donor susupension. As to the FFRs:
They are a proven product.
Reputable company and support.
Very popular and affordable resale.
Good luck.
Cheers.