I have just researched all of this and can share the following.
1. Lowes/Home Depot are by far the cheapest options for the products you are looking for. Hunter Douglas will be 2-5X the price.
2. Hunter Douglas and Lowes/Home Depot products are made to specifications that change routinely. The motors and mechanisms are upgraded as time goes by and the product lines are refined. As such I've learned than none of these products can really be repaired if they break in the future. If they break in your 5 year warranty period no problem. But most people keep window shades a lot longer than 5 years. After that time it is unlikely the motors will be made any longer and parts will likely not be available. The answer? Buy a new shade. And potentially buy a room full of them if you have multiple windows to match as fabrics fade and colors are discontinued. Oh, and the new ones likely will not be compatible with whatever old tech or remotes you have for the rest of your old shades as technology has moved on. If you are going to spend Lowes/Home Depot prices for Bali/Levelor that's probably fine (unless your are buying 10-20 of them). I would be extremely uncomfortable spending Hunter Douglas money with no promise of support from them on the motorization in 10 years, even if I'm willing to pay for the repair. I would suggest you consider how long you will be in this house when making the decision and watch you tube videos of dissatisfied Hunter Douglas owners with 9 year old broken shades and no help from the company they thought was the Cadillac of shades.
3. Hunter Douglas has much higher quality fabrics and materials. I looked at the original product at Hunter Douglas Gallery and the the knock offs at HD/Lowes (and they are all knock offs; Hunter Douglas invents everything first from mini blinds to cellular to sheer etc) and the shades just look different. The Hunter Douglas ones "sparkle" more in the light. That sparkle costs a boatload though.
4. Hunter Douglas has way more color/fabric choices than Levelor for any given product.
5. Kirsch is just Hunter Douglas branded differently and is a little cheaper. Less selection of products/fabrics.
6. Levelor is owned by Hunter Douglas but it's their mass market entry-level direct-to-consumer product line. It is not the same as HD's main products (whereas Kirsch is basically the same stuff as HD).
7. Motorization with app integration from the cheap brands is not as good. Levelor has a remote than you can program with an app on your phone to get pesudo-smart integration. Bali does it better as its technology can indeed integrate with smart systems like Wink or Samsung's Smart Things (you have to buy a hub) so you can say "Alexa open the shades" or some such thing and run them from your phone from anywhere. It is not seamless though. Hunter Douglas, Somfy, and Lutron all sell dedicated hubs and high-end apps that control all the shades seamlessly and make the most of this technology.
Ultimately I am buying a ton of different things for my home. I went with the local blinds guy for Hunter Douglas for one room and Somfy motorized roller shades for the other rooms. I interviewed a variety of vendors who all sold Hunter Douglas and they told me the Somfy brand is more reliable and upgradable if it breaks later. With Hunter you are SOL after warranty. I also am buying a couple cheapo Bali/Levelor Blinds for other rooms. In one case the Bali blind on a big sale at Lowes cost me $800 vs $2200 for the "original" from Hunter Douglas or $1700 for another High-End brand powered by Somfy. All three come with 5 year warranties. I decided if I end up junking the Bali one in 5 years I'd rather take the chance of doing that than pay over double the amount for a higher end product.
I would suggest you carefully consider the roller screens for the sliding doors. It is super inconvenient to wait for them to roll up before you can go outside. And try finding and operating the remote or your phone with your arms full of a platter of chicken for the BBQ. You also can't leave the door open to get fresh breeze with any part of the door shaded with a roller screen--it's either up or it's down. And if it's down the door is closed or the shade flapping in the breeze. Our biggest splurge was some high-end vertical binds from The Shade Store that are not at all cost effective, but are supreme on style and functionality.
Good luck--I spent countless hours researching this and it wasn't super easy. But the cost is similar to a small car for a whole house so you need to do it right.
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