This is a good start on my thinking.
You seem to have a good receiver which probably has a good speaker amplifier already built in. I assume it is a solid state (no tubes) unit. Reading the furnished reference, it appears to be a very high quality unit.
My observation of "powered speakers" is that they are usually built to a price point. This may allow the amplifier to be matched to the speakers, but both are generally constrained by the overall cost. Can this work? Sure it can. But if you make a wise purchase you can surely get better speakers if you use the same amount of money to get just the speakers and not the amplifiers. Most stores that sell speakers will have a demo area set up where you can hear the same audio being fed into all the different speakers that they sell. Some will have this area in a separate room to eliminate the room noise that a general sales area will have. This will allow you to hear any differences in the speakers.
WiFi??? The audio purists will lecture you all day long about the advantages of their favorite speaker wire which is made with pure gold (or better) and costs millions of dollars an inch due to some highly proprietary process. But I have actually conducted BLIND tests with such wires against regular lamp cord as purchased at the local hardware and THEY can not reliably tell any difference. They then claim the test was not fair for some reason. But it wasn't. They just did not know which was which before hand so they were just guessing.
But what about WiFi to carry the audio across the room? WiFi is a DIGITAL technique. The audio must be converted to digital or converted from some other digital format to the WiFi format first. And then, before it goes into an actual speaker, it must be converted back to analog. This is because, despite any advertising language to the contrary, ALL speakers are analog devices. ALL of them, PERIOD. And these conversion processes will have their problems including things like noise and the quantizing of the audio into discrete steps. While it may not degrade the audio in any way that you can hear, there also is absolutely no way that it will improve it. In my humble opinion, WiFi's only reason for existing in this use is due to the laziness of the home owner in running wires in the house. In the end, plain, cheap, hardware store lamp cord will do a better job than WiFi in
most cases. Of course, there can be problems with the lamp cord or other wire that will make WiFi a better choice in some, but very few situations.
One more observation: a shop is not a very good place for a high quality audio system. That high quality receiver is really not at home there. Personally I would install that receiver in my den where I can enjoy it's high quality and get a system that is much more reasonable in cost for the shop. But, that's me.
If I were going to install that receiver in the shop I would get plain (not powered) speakers and connect them with something like lamp cord or an inexpensive speaker wire. Either of these should be at least 12 gauge with larger sizes of wire (lower gauge numbers) being preferred. I would try it that way and only change things if there is a problem. I would choose those speakers at a store where I can listen to them before I buy.
Everyone will have a favorite.
IMO wired will give better sound than Bluetooth and the amps built into most will not be up to the quality what is in your receiver.
Stating a price range and room size might be helpful.
For just music and such or does the shop have a big screen TV and need the back channels and center?
All speakers have some "color", some are sensitive to placement. What I like you may not.
Advice on this is going to be like asking what is a good woman to pick.
Bob