Pairing Bryston 28b3 with tubes

Backert Labs.,     Zesto Leto Ultra 

I had the original Zesto Leto and it was the best sounding preamp I have owned or had firsthand use with.   It commits zero sins and sounds incredible 

As you make a list of pres to research, be aware of the input impedance of your amps.It needs to be at the very least 10 times higher than the output impedance of the pre.Pres with highish gain can be an issue also. A gain of 10db is good,but higher gain that reaches close to 20 and above means barely turning the volume control or it will be quickly too loud.Then you'd miss out on all of that tube goodness:-)I have no experience with Bryston so no recommendations.

Thanks for the feedback! I will check out Luxman and regarding the gain.

You could also try the BAT product line. I had a lesser Bryston amp quite a few years back ..4BSST2 paired with an older BAT VK30 preamp which housed 6 - 6922/6DJ8 tubes. I used many NOS and even newer stock tubes and really enjoyed swapping the tubes while paired with the 4BSST2. I always found it softened or evened out the overall audio characteristics of the Bryston amp which some would often term them to be harsh in nature. I found it quite an enjoyable listening experience as compared with the older BP Bryston preamp. The model escapes me but it would have been about 20 years ago. One word of caution is please be sure to match the AMP input impedance to the PREAMP output impedance by using the 10:1 rule. I believe the 4BSSt2 had an IP impedance of 10Kohm while the BAT VK30 had an op impedance of 750 ohm. 

Look at Octave Audio see if their specs match up