You may want to think twice about wide plank solid hardwoods, unless all your ducks are lined accordingly. Sure, some may say I have 7 or 8 inch wide solid plank floors in my home and they look great. Lot's of them in higher end homes that have fine tuned climate controlled systems.

It starts at the manufacturing level. Then your climate has to be taken into consideration. Without those first two levels being in tandem, any solid hardwood is not likely to perform as expected. IE: Look great year after year or one season to the next.

There are some solid butcher block type hardwoods out there that can work and won't break the bank. Last I looked Armstrong had some, but I don't follow them closely nowadays.

Mills can be rather regional. Without knowing where you are it would be somewhat pointless to recommend suppliers. I agree with Uptown. Wide plank is risky. If you're on a budget, pick something more reasonable and don't be tempted to cut any corners.