I have been in the sales office a few times so let me know if you need any help. If you wanted wood floors you would need to purchase the home prior to it being finished in order to select your own flooring. I live in that neighborhood so I have been watching it go up.
Asking for washer/dryer and frig may be an option if they have a home to sell quickly. Incentives are always given on homes that need to sell faster. You may not get the floors you want so it's always a trade off.
Also, keep in mind, new construction does not include window covering, so you will want to make sure to budget for those essentials.
All the best to you in your new home.