Charlie, If you are doing a new custom house I would use a floor truss system. it allows you to put all mechanicals and plumbing up in the ceiling. This makes for a clean basement ceiling. It didn't work out in my case. Also, if you can find a lot, a south facing walkout is the best. It doesn't feel like you are in a basement. You never get all of your wants in a house. Talk to you more later.
Dan
P.S. The first "extra" upgrade should be SPRAY FOAM INSULATION. This will make the house very warm and draft free.
Thanks Dan. I found a lot and really like it. I'm not sure a walkout will work on this property, but I'm still going to have plenty of room and headspace. Laundry will not be in the basement, so it will all be mine.