Non-rear ported Speakers

First, I have read that front ported speakers are not sonically viable. Any credence to that minority opinion? 
Second, I am finding them enjoyable in my near-near field garage system. Small Ushers and Monitor Bronze 2. 
Looking to add a third under $800, new or used. Any suggestions? Looking strongly at the Triangle Bro3. Sealed options are fine.
Mishmash of integrated amplification. Vintage Pioneer A-51. Various class A/B, D, T. Garage is experiment city.
Near-near field about 3 feet. I brush my teeth with the music down here.