Choice between two different integrated tube amps (SET & PP)

My point is the American brands I mentioned in your price point are not only better but they all can be serviced.   I believe they are inherently.more reliable because they use better parts.   Buying a Chinese amp with no support network is a recipe for disappointment.   

The Primaluna is a top notch Integrated amp.   I owned one.   I’ve not heard the Willsenton.   The answer so depend on the rest of your rig.   SET, PP, etc.   what works best for your speakers and source?   Can you try both in your rig?

Trust your ears, not other’s opinions.   Hear the difference and decide for yourself if there’s value for the sonic difference.

I would look at allnic, mactone and even consider building an elekit amp in your position........ Line magnetic 845 never has bad reviews.... 

It always cracks me up when the "buy American" adage comes up in these threads.  If you took out all of the "foreign" parts in those American amps, you'd be left with an American doorstop.

Plenty of Chinese products use top notch parts from all over the world, not limited to using only Chinese parts. And yes, nearly every audio component made in more recent past and today is hybrid Chinese product.

And I don't mean to say the Willsenton cannot be reliable, research it and if it has good track record it could work out.

I don't know impedance curve of your speakers, but with 98db sensitivity 845 should work. With that sensitivity and benign impedance curve 300b is even possible, can't have severe slope or drop down below 6ohm.

Keep in mind 805 and 845 amps are space heaters, they'll heat up your room in summer. But then SET sound sublime.