I would look at the Vivid Kaya line. I have recently heard them in a large listening space and was very pleasantly surpirsed despite the relatively diminutive size of the Kaya 45. There are similarities between the Kef Blades and the Vivids in terms of cabinet as they are both fiberglass though I like Vivids core better. They both have side firing woofers in opposition, etc...
The actual baffle size is less critical. It comes down to the amount of energy that exits the cabinet and the Vivids and Kef do a wonderful job of daming internal sounds so that most of the energy exits the cabinet.
Horns of course do the same. IMO, you get a more lifelike and refined sound with the Vivids or the Kefs but they are quite a bit more expensive.