Combined speakers yeild even better performance

The other day I decided to try something I've always wanted to try. I wanted to see what it would sound like if I added an Energy Veritas 2.2 (good quality bookshelf 3-way speaker) to each of my Thiel 2.3 front speakers. The Energy speakers are stacked on top of the Thiels (using spikes with protective disks underneath) and are slightly angled down toward the listening position using longer spikes in the rear.

The results were very surprising. The dynamic range was improved, and the over-all sound was more coherent and full. The performance was incredibly engaging for both music and movies.

The problem is, I'm stuck in a moral dilemma. How can a mess with the design of such a great speaker as the Thiel, even if the sound produced is better than before?

I'm wondering if anyone else has ever tried this experiment.