Anybody in southeastern Michigan, strongly consider getting your lumber at Chelsea Lumber. I just picked up lumber for several projects there, and got out for a great price. The lumber is also considerably better quality than anything that's ever passed through the doors of Lowes or Home Depot.
The best part? When I wasn't sure about the material I wanted to order, the salesman took me back into the lumber sheds to make sure that the material he had was really what I wanted. Which turned out to be a good idea, because the birch plywood I was going to buy was out of stock except for one damaged piece, and instead I left with excellent oak plywood for slightly less money.
The 1x4s I purchased were actually straight - the pieces they rejected would have been among the best I found at the big box stores. The wood was also surfaced with a helical cutting planer. The little scallops that you're forever sanding out of your 1x material aren't there. It's a smooth surface.