As with another recent poster, it would help if you clarify whether you mean bookshelf, as in a speaker to sit on a shelf, or possibly direct on the wall, or whether you mean a standmount, often positioned away from the walls. The two functions are different. If the latter, then it would be worth checking out this recent thread:
And re your question, the declared impedance gives no idea as to how easy speakers may be to drive, though a look at the impedance curve (rarely available) could well help.
It would probably help if you indicated your anticipated max budget.
You might want to try Dynaudio Emit M20s. I heard them sounding very enjoyable on the end of an Atom, which is only slightly more powerful than your UQ. Even with dedicated stands they’d be well within your budget.