+1 to @james633 ’s post.
I have JBL 4349’s and enjoy them. Most audiophiles will dismiss these cabinets, but I have found they are very smooth, able to play at very low volume with accuracy and detail, but still able to play at full tilt and fill a room with that same accuracy and detail; a very enjoyable experience. The compression driver and waveguide are (only in my opinion) a home run by JBL for this price point in their lineup.
To your question about if a more expensive ported cabinet will sound better than a lesser sealed cabinet, many times the rule "you get what you pay for" will apply (not always, but typically it does). From my experience, an inexpensively designed sealed cabinet with cheaper components will be outperformed by a ported cabinet with great components (drivers, crossover design/components, cabinet material, etc.).
I would not dismiss a speaker just because it’s ported. If the designer has done the work, porting will not ruin the experience even if one favors sealed designs.
Feel free to see my 4349's on my system page.