I've been very happy with the Jolida FX-10, It's been completely reliable, the auto-bias function makes swapping tubes easy and it sounds very good, whether in my office system with JohnBlue JB3 single speakers or in my main system with DeVore speakers.
I'm sure there are excellent alternatives but my experience with the FX-10 over a couple of years of use has been very good.
I'm sure there are excellent alternatives but my experience with the FX-10 over a couple of years of use has been very good.