A good amp for those using tube-type transceivers is the Swan MKII. Rugged, heavy duty, reliable, 80-10m only (no 160) but they last and last and last. But no tuned input, so more appropriate for tube type transceivers or hybrids. Its predecessor, the MKI, wasn't good. The MKII is way better. The Dentron Clipperton-L is also a good amp for use with tube or hybrid rigs; the very latest models (Clipperton QRO or whatever) evidently does have tuned input networks which should be suitable for use with SS rigs, but I've never had one of those.