I've used a lot of amps and preamps over the years, trying to get a really good sound without making a sound to the outside world.
Love the Ethos! So simple to use, just take the speaker emulation outputs and run it into a good processor, then into the boards. Love the clean channel, love the overdrive channel. Love the speaker emulation without having to resort to a DI. The clean channel sounds great with archtops and strats, the overdrive best with humbuckers