I'd like a new compressor. The thing I look at is the electric motor powering the compressor. They are typically Emersons with a data tag that says the HP Rating is "SPL". That means the compressor maunfacturer can claim about anything he wants for HP.
I stumbled across a compressor at Homely Depot that had a big sticker on the tank claiming 7.5 peak HP. Interestingly this compressor had the usual Emerson motor but with a data tag that said 5 HP. Hot Compressed Air Sales Pitch.
I'm saving up for something better..... at least until my 30 year old puffer quits. It was smelling a little warm in that area of the garage today. At 8500' most anything will have it's tongue hanging out up here.