Yes, Class A amps have better power driving ability compared to Class AB amps. I once had a Musical Fidelity Class A amp that sounded vastly better to the AB amp that had higher power rating. My only concern was that the Class A amp ran too hot, I got worried whether it will “burn out” sooner (or burn my house if I accidentally left it on for some time, haha!). But the top names that have Class A should reassure of their durability and stability- apart from MF and Sugden, Accuphase, Krell make good Class A amps.