I am so sorry to hear about your loss. I hope that the loss was only structural, and that everyone made it out safely. It's a terrifying peril that we always hope will not happen to us or those we care about; I am so sorry it happened to you.
It doesn't look like any jurisdiction in Ohio presently provides rebates for installing "Watersense" (i.e. 1.28 gpf) toilets, so there is no imperative other than being a good neighbor to consider installing them.
You usually can't get out of this forum without someone making a pitch along the lines that if you liked the Cadet 3, you'll love the original 3" flush-valve toilet, which would be from Toto. In the same price range as your Cadet 3 is the Drake G-Max 1.6gpf or the equivalently-priced EcoDrake E-Max 1.28gpf toilet. Also, just a little nudge up in price is the Drake II, which packs as standard equipment a bunch of features that would cost extra on the Drake, like CEFIONTECT finish (to reduce staining and skid marks) and a Universal Height elongated bowl. It also has the swirl-action Double Cyclone flush which gives a great bowl wash on only 1.28gpf and still sucks down that waste. Both are great designs, with the design focused on great engineering of the trapway and bowl-siphon, to do more with less water. All the toilets mentioned use simple parts for which American-made factory-authorized replacements from Korky are readily-available locally at an inexpensive price. And Toto's quality control is the best in the business, so you are least likely to have a lemon land in your new bathrooms. Sometimes, plumbers and designers who know the brand are reticent to suggest it, although they respect it, because many customers don't know what a quality product it is, although that is changing. So it might be be worth broaching the subject of Toto with your professionals and see what they say. Or just telling them that that's what you want. If you shop around, and hondle a little bit, as I do, you'd be surprised how price-competitive Toto's premium-quality products can be. Okay, that's the pitch.
As to the PRO, I thought it was part of AS's marketing program to try to get back some of the folks in the trade who had abandoned them. Like isn't this a "trade-only" fixture, so that professional plumbers are not competing on material price with HD? (Fluidmaster did the same thing with a pro-only, red-capped version of the 400A fill valve.) Of course, if the AS quality control is as crappy as many of the pros on here say it is, then this marketing will/should fail. There was a sad photo earlier today from a guy who had waited weeks for a Cadet in a special color that he had ordered through a plumbing supply house, only to get it home, carry it upstairs, and discover a dime-sized area in the bowl that wasn't glazed. How did nobody see that? Did it pass through the QC station in Tijuana while everyone was on siesta? BTW, problems like this are a management issue, not solely a location-of-production issue. Toto seems to be able to make product successfully in Mexico, but there are no doubt teams of workaholic Japanese-expat managers down there staying up late to tweak, retweak, and re-re-tweak the process to make sure the output is top-notch. Heck, the Toto fixture that I received that was from Vietnam or Thailand or such was a piece of quality workmanship that fit right together with the US-made tank. It takes good management to make that happen, and it doesn't look like AS is exactly shining with their Mexico-produced products these days...
I wonder if the PRO series is supposed to address concerns of plumbers like Terry who bemoan having to take multiple tanks, bowls, etc., along on an install so they don't have to make a second trip when one is defective. Or is it just fluff? I, too, would be curious to know, although I probably already know the answer...
Whatever you choose, Sir, I hope that the rest of your process goes smoothly, and that you and your family are pleased with the result...