Linn Majik biamp question

I have an older Linn Majik, I think it was made in the early 90's and I'm thinking about adding a second amp to biamp. Since my Majik is a little older should I use a LK100, a LK85 or does it really matter. I don't think Linn was making the LK85 when my amp was made and I'm wondering if it would match the LK100 better. Thanks.