My favourite head. The Marshall SLP1959 in mini format (20W). It's a tough one to beat if you like the classic raunch of a Plexi. Here I'm driving a couple of late 60's Greenback IR's in the Axe (via the Fractal Audio X-LOAD Reactive Load). But the amp - it's all real. And all rock!
https://marshall.com/marshall-amps/products/amps/studio/sv20h
https://www.music-man.com/instruments/guitars/axis
https://www.fractalaudio.com/x-load-lb-2-load-box/
https://www.fractalaudio.com/iii/