Havent said much on the subject so far, just been watching and reading..
With only a couple of hives, I would say that you can use which ever combination you think would work well. You wont ever be flooded with hundreds of supers stacked in the shed, extra boxes here and there and other equipment all over the place, so your choice is a little bit more "free".
I use ALL medium ten frame equipment. Moots uses all medium eight frame equipment.. I am going to have to go with MOOTS on this one.. Standardize, and use the eight frame boxes. You will be able to throw those about for years to come. The OPTIONS using standardized boxes is really nice.
Three mediums = two deeps in height. It means an extra box, but that extra box is much easier to MOVE by yourself.. Now I realize that.. your... what? twenty five??? Judging by the picture??? But in 25 more years you'll be 50, if you still have those hives your BACK will thank you for going with the lighter boxes.
When you harvest your honey. Always take a few frames of honey and pop it into your freezer instead of extracting. Mark these frames so you know which ones they are. In the fall as you get ready for winter you can thaw them, and drop them into your hives in the event Mother Nature didnt give you a decent fall flow. Mark them so you can replace them in spring before treatments to keep your honey/wax clean when you treat. (IF)
One size frame, one size box for all your hives...
Now... spring has sprung, you look out your window, cup of coffee in your hand, and SEE BEES everywhere!!! One of your hives is swarming!!! OMG!!!! Now what???
Well, the easiest answer is to grab one of last years honey supers, set it on a board and shake the swarm into it. Put another board on top, prop one end of the box up slightly to make an entrance. Scrap pieces of lumber placed around the edges can reduce the entrance until you can get a bottom board and inner/tele cover.
You have another hive..
If you dont want more hives, it can be given to the neighbors son, or daughter, or even SOLD very easily.
I'm sure you know that every method has advantages and disadvantages that can be argued constantly. I like my boxes all being the same.. I do still have a couple hives with deeps on them, and its something I have to force myself to remember when taking frames to have drawn. Its caused me to make more than one trip on more than one occasion.
SlowModem has a good point too.. with three mediums, it allows me to pull the bottom box, set the two boxes on the bottom board, cut the wax out of the top box and put it back on top for the ladies to draw with new clean wax. Not exactly reversing since you left them with two boxes, but it puts your wax on a three year schedule and helps keep it new and clean/clear of pesticides/treatment contamination.. even if you dont treat, the ladies will bring home some bad stuff on occasion.
You wont go wrong whatever you choose to use. Just think about YOU and what will be advantageous for YOU!
