Which phono section: Linn Linto or Bryston 1.5 ?

The Linto is great with Linn's Arkiv, for which it was desigmed. That's how I use it. and have no complaints. However, it offers ZERO flexibility. You cannot change the gain, the laoding, etc. So....for use with anything other than the Arkiv you might want a phoo pre with a bit more flexibility. If the Bryston gives you that (nt familiar with the unit). I'd say go for it.

What about the Benz-Lukaschek phono section? It was made for the high end Benz cartridges, and costs about the same as what you are asking about.

With your electronics, turntable and cartridge I would probably look onto Pass X ono or ARC PH3SE.
Bryston phono sections to me work no better than Nad PP1 or Creek OBH9 i.e. too far away from music.
Benz-PP1 is great if you want to get stuck with Benz cartridges which I can say are great.