What tube preamp with Bryston 7bst? Please?

I am using an Audio Research LS 8 Mk2 into my Brystons and it sounds good to me, but what do I know?

Am using a used(ancient?)ARC LS 2B with a Bryston 14 BST with great results.Was never satisfied with the Bryston BP25 preamp.Somehow it never jelled with my listening tastes.I have experience of ARC and CJ and recommend them without hesitation.You have not indicated any budget hence not sure whether you want new or used.
If possible do a home and go only for what sounds best to your ears.In general tubes work just fine with the Brystons.
Happy listening.

Magnum 99 linestage with my Bryston amp - great match! Caveat is that I have not experimented with other tube preamps but why screw with something that works???

Hello
Copland CTA 301 MkII is a match made in heaven with Bryston amps. The Copland has blown away every preamp I've tried on Bryston gear. Including ARC LS-15, Conrad Johnson, Blue Circle, Rogue Magnum 99(good piece), Chord, and Bryston preamps. The Copland turned Brystons sterile nature into a warmwer vibrant presentation. Most noticeable was new found detail without brightness, incredible soundstaging width and depth....(with no shrunken images, and incredible seperation between images), but most importand LAYERING to die for. Bryston has known to be 2 dimensional sounding, the Copland makes everthing sound more 3Dish. This exact question has been asked a few times on Audiogon, do a search......
Hope this helps
dudeaudio

Suggest you look for a Sonic Frontiers Line 1,2 or 3 and
connect to your Bryston via the balanced outputs.