I have listened to LM 508IA (not the 845ia though), PrimaLuna DiaLogue Premium HP, and Raven Blackhawk MKIII. To be honest, they all sound more similar than different. You’d be hard pressed to tell them apart if you were blindfolded.
I went with Raven because I like the idea of owning a US-made product. I also happen to own an Audio Mirror Tubadour III, and it mates very well with the Blackhawk. Also, this amp responds quite well to tube rolling, i.e. the differences are easy to hear. If you’re based in the US, no reason to give your money to a company that builds its products in another country.
For your specified budget, consider Raven Osprey as well. The extra power will future proof your purchase.
I went with Raven because I like the idea of owning a US-made product. I also happen to own an Audio Mirror Tubadour III, and it mates very well with the Blackhawk. Also, this amp responds quite well to tube rolling, i.e. the differences are easy to hear. If you’re based in the US, no reason to give your money to a company that builds its products in another country.
For your specified budget, consider Raven Osprey as well. The extra power will future proof your purchase.