I've had one Carver and two PL preamps. PL's were the 3300 and the old 2000. Never had the 4000, not sure I would go that route. Out of all 3 Bob Carver pre's I have had I preferred the 2000 the best.
Guinness fan here as well. Kinda like medicine that tastes great.
Here's a very tasty one, from the oldest commercial brewery in the world, since 1040 AD.
Lee has a particular set of skills, skills he has developed over a long period of time, skills that are a nightmare for drivers like in speakers......................