A "High Lift" track set up will not cost that much more than a standard track, whether it's for a 7' ht. door, or an 8' door ht. door. It's basically just longer sections of tracks, & longer cables. The springs & the rest of the hardware should be the same. This option for my doors was an addittional $57.00 each. It brought the doors a lot higher, but I forget the exact height, & may vary depending on what is available. They are not flush with the ceiling, but definitely worth the difference.
If it's not too late to change the header height of your door openings for an 8' door, do it. The cost difference of the 8' door compared to the 7' is almost nothing. It's not until you get into the ones above 8' ht. (which are commercial or special orders) that you will see a huge price jump, like 50% or more. When I built my garage in '97 I had room for a 10' high pair of overhead garage doors, but that put them into a commercial grade door. This also gives you a lot less options as far as appearance.
If saving money is a priorty, one thing to keep in mind is that you can always add the door openers later if you wanted to save a few bucks up front in the construction costs. I haven't added any openers yet, but I don't use the garage for daily drivers. The springs take the weight off of the doors when you lift so it won't be heavy. I can open my 16' x 8' wooden doors with glass panels, which are very heavy by themselves, with one hand & little effort.
I added a pic to show what the high lift track difference is.
