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.




jpwarren58
https://www.ebay.com/itm/Paradigm-Studio-10-v5-pair-in-cherry-w-original-box-nice-used-condition/283...

Not this pair, and certainly not on eBay but in your price range.  They're small, so convenient for near field, and IMHO possess a detailed sound that may happily surprise.  I own a pair precisely for the reasons you mention, rear porting doesn't  work in my WAF-assigned placement options.  I thoroughly enjoy them.  If you find them not your cup of tea, an easy re-sell, I think.  
I have a pair of original Snell Js and a pair of Genesis 11s- both front ported.Sound great.
A vote here for front ports. Rear ports need too much wall setback. And full enclosures, even with 22Hz bass, just sound boxy. Again, your results may vary, but those are mine.
IF ports, front ports only to retain directionality of bass and those bass note's overtones.

IF subwoofers, a small stereo pair, same reason, and sub self powered, wired so that the bass chores are eliminated from both the main amp and main speakers
My last two speakers have been front ported. Original Aerial 6's and now my current Aerial 5T's. Both were easy to place in a small apartment.