Surface Pro 4 - 10 different models - Which would you buy?

I noticed that there is no Surface Pro 4 forum, yet, so hopefully this doesn't get buried.

I watched the Microsoft #Windows10Devices presentation with an emphasis on the Surface Pro 4.  I need to buy one for my daughter for her next 5 years of college.

I had an idea of what I might expect to spend, but I didn't realize how many configurations there were until I visited Microsoft's online store.  It appeared to be a little overwhelming with the configuration options, and they didn't provide an option to compare the specs and prices.

Here's the link to my spreadsheet.

I created these tables to show the differences, and maybe, find out where the best value, for me, lies. The 1^st^ table shows all the different configurations and their respective prices.  After creating the 1st table, I realized that the price/performance/specs ratio still fluctuated.

It was easy to create the 2^nd^ table, simply sorting by price, and realizing a few things.  {Bear in mind, these are just my opinions of value and 'bang for the buck'.

Firstly, there's no reason to buy the Core M version, as for $100 more, you would get the i5 model.  For my needs, 128 GB of SSD is too small, so that eliminates the first two models.

Personally, I don't believe the cost for GB for the 512 GB SSD is worth it.  If needed, external or online storage would suffice for me.

In my opinion, there is really only two models that I could see buying: model 5 or 8.

Model 8 worries me a bit, as I'm not too sure what affect the power and heat will have on the battery for the faster processor and graphics.  (Remember the rumors and speculation that the Intel Skylake processor would enable a fan-less device? We can still dream, though.)

Therefore, Model 5 is my choice.  Add in the cost of the fingerprint keyboard and protection plan, and I'm up to $1800, anyway.

I would love to hear from others to see what your opinion is.

{Now, let me compare the Surface Book, and see if that's where I should spend my money.}

Edit:  I saw a video that showed the Core i5 is the i5-6300U, and based upon the Core i7 having a 15-watt TDP and an Iris 540 graphics chip, it is most likely the i7-6650U.