Yes, I'd have no problem with buying a floor model. But, last November as I was about to buy a floor model washing machine marked down 50% because of a moderate dent in the side (wouldn't have mattered because my washer goes in a closet) at Lowes, the same one (unblemished) went on sale on JC Penney's website for 40% off, plus there was a $50 rebate, plus JC Penney had 11% back on Ebates for Veteran's Day - so all of that made it slightly less expensive from JC Penney. Though if I'd gotten the floor model I could have brought it home immediately, during the still-cooperative early November weather, whereas the delivery of the one I ordered online was delayed once due to a late-November blizzard, and the following week the delivery guys got their truck stuck across the icy road, greatly angering my neighbors. So in hindsight: for overall convenience and neighborhood harmony the floor model would have been the way to go.
I don't have a dishwasher.