Rule of thumb selling audio on average ,you want the main tweeter level just about at ear level , that being said doesnot always apply
i bought a like new pair of Dynaudio , 3.5 fooor standers and the tweeter is on the bottom, this iso tech,isotar tweeters have great expansion I would buy the iso acoustics pucks to put under the speakers for vibration ,this way too it would add 2 inches to the height and should work out well , just keep in mind toe in as needed
if sitting in the center.