Not knowledgable but learning in the process.
Some of these established names still exist and their technology are not outdated. Brands such as Naim, Musical Fidelity, Gryphon, Bryston still exist and are very well known in audiophile circles.
I love big powered amps for big inefficient speakers. Some speakers just demand it. That Sunfire 300w is sure juicy but will be an overkill for Susvara. There wouldn't be much play on the volume dial.
A quick search on the internet and you can see it was very well regarded in it's time.
https://hometheaterhifi.com/volume_2_1/productr.html
I'm still so rapped with X150 driving Susvara. It's just so right tonally and that punch.