A recently licensed ham asked me advice about HF amps. I spent the first 30+ years not using amplifiers, and have now gone all solid state, so thought I would ask here on recommendations. His use-case is occasional use at approx 500W output. He is a dx-er and budding contester. His options are: 1) A nice condition Collins 30L1 Tried and true, 4x811 tubes. No 160M but a time-tested classic that holds its value. 2) An Ameritron AL-80 (oringinal, not an 80A or 80B) single 3-500Z. Discontinued for 20 years or more. This one was made after rework from Dentron. Seems to be a nice amp, although the metering isn't the best. 3) An Ameritron AL-811H (purchase new or like new). Inexpensive tubes, available parts, etc Lots out there in use and seem to be quite popular and 811's are still inexpensive. Price point for these are all around $600 Which would you select and why ? I'm inclined to suggest the AL-80 simply because the 3-500z is so durable but want your thoughts and opinions to share with him.