Cayin, Line Magnetic, and Willsenton with 805 Feedback

My experience with LM was positive. But I owned the LM-88IA. Build quality is very good. When I was ready to move on, it sold quickly and made room for a Raven Osprey which was awesome but obviously more $$$

ive now moved on to SS based on speaker choice but I really enjoyed the Osprey.

Can’t speak for LM or Willsenton, but Cayins are indeed excellent. In fact I wouldn’t hesitate to pit Cayin performance against the likes of VAC and Audio Research. 

I had an original Cayin A88T that was built in 2006. I was at least its second owner—owned it for about 6 years between 2017 and 2023. It never gave me any issues other than a failed preamp tube, and is/was built like a tank. 
 

The Rogue Cronus Dark is also around your price range and sounds excellent. 

Completely agree with @helomech. I still own a Cayin A88T Mk II that I purchased around 2007. It sounds great, built like a tank and responds well to upgrading the preamp tubes. I rotate the Cayin into my system with a Luxman integrated.     

I have no experience with the Cayin or the Line Magnetic, but I do own an R800i that I’ve had modified by Scott Frankland (had a 300B tube blow and the amp wouldn’t biasing correctly). Here’s a cut and paste of a post I made on StereoNet:

"Sent my amp to Scott Frankland (https://scottfrankland.com/) to give it a look over since I had a 300B tube blow and it wouldn’t bias properly. For any unfamiliar with Scott, he’s the "F" in the old MFA preamps including the Luminescense and the Reference, both of which have cult-like status with some. In short, he’s a very experienced circuit designer/tech.

He is upgrading the caps to VCap ODAMs and we switched out a bunch of resistors.

He also saw there was a design issue...there are no bypass caps on the plate voltage nodes near the tubes. Scott said since the two channels share the same nodes, it’s especially important that these nodes are bypassed."

Scott also added more capactiance to help battle hum, as he thought what was there wasn't enough. I do really like the R800i and consider it a keeper as I’m kinda over going down the new gear rabbit hole ATM. The R800i is in a different league than the R8, and I liked my R8.
 

I should also add that the Cayin A88T is the quietest tube product I have ever encountered, that goes for amps and preamps alike. Thing was dead, dead quiet. Can’t even say that about some solid state preamps I’ve owned.