I just have two shelf / floor stands. They rock in that they allow you to slightly angle the screen up and down.
For the PUC you need to look at what devices you will add via the HDMIs.
Each HDMI can have a PUC associated with it.
This means for me that I can control my Foxtel/Sky set top box via my Beo4. No need for the fancy FOXTEL remote.
Similarly I control the Apple TV "set top" box the same way. No need for the old silver Apple remote.
I do use the new Apple remote for the Siri commands.
The advantage of the OUC system is all the set top boxes are inside a cupboard out of sight.
There is no need for infrared line of sight.
For each device you will need its unique B&O to infrared translation table / code.
You are being offered a good deal - just make sure your devices are in the list.
You do not need the ML to attach speakers. It is only for linking to speakers in other rooms or other old beovisions or old beomasters or old beosounds.