Which types of speakers are ideal against a wall?


I currently have rear ported floor standing speakers (Dali Euphonia MS-4) against the wall due to no other room options.  Are these speakers feasible?   I also have 2 Rel 528s along side each speaker.  I am looking at replacing the speakers.  I also have 2” acoustic treatment w 2” brackets behind the speakers.  Any speaker suggestions in the the 5-7k range (used) welcomed.  

Equipment:
Modwright 150 SE 
Dali MS-4
Rel 528 Qty 2

Room 15 w open wall  and 17 L 
puffbojie
Vortex by Von Schweikert speakers VR22, VR33, VR35 are designed to go right up against the wall. No port, has rear facing 10 inch woofer.  
Yep, they'll be fine, but stuff the ports with a sock or something. You'll get the bass back thanks to the rear wall reinforcement.


Best,
E