I have used Model 19's with both Paraglow II [paramount's 2A3 predecessors] and SEX amps for a number of years and each is able to drive the Model 19's to beyond comfort level volumes without any problem. It seems that a SET watt is worth a bit more than a regular watt or that Altec is being very conservative with their recommendations . The 2A3 version of the Paramounts should drive the Altec's without problem. My experience is that bass is also very dependant on speaker position and the room they are in. When my Model 19's were in my main system in a 20' room with the Paraglows, the bass was sufficient but nothing to write home about. When I moved them downstairs into another smaller space where they were by necessity closer to the walls, the bass improved dramatically even though they were being driven by a SEX amp. Perception of sound and what a person likes is such an individual thing, but for me the Model 19's and Bottlehead products produce wonderful full sound together. The Model 19's are certainly efficient enough for Paramounts, whether you'll like the bass that you get is hard to say.
good luck
Bryon