I've owned about all of them over the years now. The KLF series is good and there's some good models in the RF series too. In the consumer lines, I would consider various Cornwalls, Choruses, Fortes, CF-3s, CF-4s, KLF-20s, KLF-30s, RF-7s, RF-5s, RF-83s, and RF-63s all to be on about the same...