I have to start out by saying that I currently have a 26 line stage and are pretty happy with it. I remember a long time ago I tried a 10 and liked it but could not deal with the hum. Something about a thoriated tungsten filament that appealed to me. So now looking for my next fix. Thinking 01a or even a 101d (not thoriated). May even go back to the 10? I don't need a lot of gain. Anyone try either of these?