Hello again,
The 8200 is awesome and is better than any separates I have heard in the same price range when you compare new retail to new retail.
As for tubes, pre-amps are easier because you don't have to bias them and they usually last at least 3 years and some last 5 or more years. Tubes for a pre-amp are easy to change and don't cost much. ($20 to 60 each) most pre-amps have between 4 tubes and 8 and most often only 2 to 4 of the tubes are more expensive.
The 8200 is awesome and is better than any separates I have heard in the same price range when you compare new retail to new retail.
As for tubes, pre-amps are easier because you don't have to bias them and they usually last at least 3 years and some last 5 or more years. Tubes for a pre-amp are easy to change and don't cost much. ($20 to 60 each) most pre-amps have between 4 tubes and 8 and most often only 2 to 4 of the tubes are more expensive.