автор в вашем случае я бы взяла только префинишед хардвод. при анфинишед у вас будет везде пыль.на кухне кладите - либо slate, or limestone, granite is ok too. discuss with your builder the transition pieces between materials. also, in the basement remeber the sub-floor and water-proof membrane.go with oak, 3.25 width. if you can go with wider planks, do not go for exotic woods - very tough to maintain