New Home Construction: Things to consider?

My wife and I purchased a building lot and got possession Dec. 1st. It is in our desired neighbourhood, has a beautiful ocean view on East Vancouver Island (very moderate climate) and we see ourselves living there for very long-term. We have a nearly two-year-old and a three month old, so our family is complete. The lot is on a slope, with the back of the house facing the ocean. We are budgeting for a three-storey home (entry level with all the main living space, a walk-out basement with open rec room/bedroom/bathroom/utility/storage and a third story for the primary bedroom/ensuite/kids bedrooms. We may leave the basement unfinished to save a bit on initial budget, as we won't need the space immediately.

The design phase of the construction process will begin in the new year and I am wanting to make sure we can think of everything for the now, and for the future, to integrate into the build. Our current house was a new build 8 years ago, and I was a little involved during that process (running some Cat5 and speaker wire; taking pictures of everything in the walls before drywall went up...etc.). Considering we see this new home as a "forever home", or at least where we'll be raising our kids, we want to make sure we make some smart decisions on the cosmetic stuff that we can upgrade later and save us on the budget now. We also realize that we need to spend the money where it makes the most sense in the beginning, and I wanted to ask anybody else who has recently/currently gone through the same situation.

Some of the things on my list to give you an idea:

• Run Cat6 to all rooms/locations it will be needed, including wifi access points. I stream all of our media from desktop PC to Fire Sticks on our TV's, may also setup a dedicated NAS at some point in the future - But essentially want to have all networking options ready and available
• Run speaker wire for speakers in main level living room, kitchen, deck
• Rough-in for electric car charger in garage
• Rough-in for hot tub connection
• Rough-in for wet bar in possibly unfinished basement
• Durable finishes (flooring, cabinets) that will be able to take a beating from the kids growing up
• Highest possible ceiling height in basement (*budget*)
• As energy efficient home as possible (appliances, windows, doors etc.)
• Outdoor plugs strategically placed for Christmas lights, outdoor cameras etc.
• Natural gas connection for BBQ/Stove (this is pretty standard anyways)

I know this isn't everything, and I've left off some of the obvious/common things, and this is a dynamic list as I am usually thinking of stuff at all hours of the day in anticipation of design/construction starting in the new year. I just wanted to pick the brains of everybody here and see if there's something I haven't thought of.