Yes I have experienced reliability issues with Jolida - my choice would be ASL but it costs more. My dealer recently dropped the Jolida line in favour of the ASL -- they carried both for 2 years as a trial run and ASL has less problems is built better and sounds better -- but Jolida has more options such as hybrids and they look better.

There other tube amp makers callled Almarro and Cayin that may be worth checking into which may be better. There is a Canadian Tube maker which si supposed to be very good and VERY inexpensive -- easily under $500.00(if you build it yourself) called Mapletree Audio. Their main thing is preamps and headphone amps but one could buy a preamp and power amp combination that would be around the $500.00 range (this would be a separates set-up with monoblock amps.

The NAD 320 is the worst budget integrated amplifier I have ever heard in this hobby in my entire life. My dealer sells it and was on the phone for hours trying to get NAD to put the designer on the phone to explain the issues all of his 320Bee amps were having. The amplifier does not create a proper soundfield or realistic stereo image when it should, has a dead sounding bottom end. Directly A/B'd to the Rotel RA-02 it was shocking that two budget SS amps could be so polarizing to listen to -- equally shiocking that both get great reviews.

The Other NAD integrated such as the 370 sounded much better (though the 370 does have a constant transistory sounding etch to the thing -- but it has a ballsy brute force Bryston like presentation for much less coin than a Bryston so there is appeal there.