I think it's definitely a personal preference, I have friends with RX-8's, and most of us make fun of them saying they drive a girls car. I think it's butt ugly and I think the FD is a timeless design that will still look beautiful for another 15 years or more. I see the RX-8 looking like a futuristic tiny toy. I also have to disagree on the statement it will run faster than a swapped RX-7. In a STRAIGHT LINE that might be true, but the RX-7 is such a visceral ultimate driving experience on a real track. I hate the way my friends RX-8 handles at Auto-X but I haven't driven it at a real track. Plus, on a side note, most of us have been able to get our FD's below 3k lbs. as well and that makes it hard for me to believe that an RX-8 would beat the FD. Surely wouldn't beat mine that's for sure. That's probably because I have an LS3 though.
I believe your price is close to reasonable, especially since this swap hasn't been successfully completed on a mass scale yet so I'm sure there was some headaches you had to tackle. Somehow I remembered the price being lower when it was first posted maybe? Anyhow, I hope you find a buyer man!