I just picked up a Yaqin MC-30L tube amplifier. For under $650 it is a fantastic value in my opinion. It might sink your boat as it weighs around 45 lbs.
Seems like solid state would be a better fit for a boat. The Rega Brio is well reviewed and is small.
Seems like solid state would be a better fit for a boat. The Rega Brio is well reviewed and is small.