I haven't heard 3As in a long time, but I own the 1Cs and 2Wq subs. If had to pick a speaker most unlike the Vandys, I might well pick Def Techs. YMMV, but I find the Def Techs harsh, too bright and brittle sounding. Vandys, by comparison, are pretty smooth (some say too smooth, but not me). I have no experience with Parasound, but Vandys do well with higher power amps (both ss and tubes). I run mine with an Odyssey Stratos HT3 to good effect.
In the price range of the 3A, but with a better WAF, I would also audition:
Silverline Audio Allegro
Totem Forest
Reference 3a Veena
Ohm Walsh S3200
Joseph Audio RM 25siMkII
Vienna Acoustics Mozart Grand
In the price range of the 3A, but with a better WAF, I would also audition:
Silverline Audio Allegro
Totem Forest
Reference 3a Veena
Ohm Walsh S3200
Joseph Audio RM 25siMkII
Vienna Acoustics Mozart Grand