First, welcome to the forum. You may not always get the answer you're looking for, but we do try to provide honest and realistic answers to DIY questions. The Kohler line of toilet does not get very high marks from most of us. Kohler (and American Standard) at one time were state of the art toilets, but they have outsourced and/or merged their production and they quality has dropped considerably. The world's leading manufacturer of toilets today is Toto. Many of their models are made in the US, but their plants in other nations still maintain extremely high quality. You may view many of their models on this forum by following the link at the top of this page. The space specifications are included. Elongated toilets are by far the most preferred design, but you may be able to save a bit of space with a round bowl. I would advise you to rethink the laminate flooring in the bathroom. These to not react well to water spillage. You should have no problem with condensation with a new low flow toilet since the tanks hold about twice as much water as a flush uses, the refill cold water mixes with the leftover and tempers the temperature which means little condensation.