I've been using a Dynavector 10x4, list $325, and it works terrifically well with the same TT & arm as yours. Here's a review with it on the same set-up:
I have always used van den Hul cartridges on my LP-12 w/Akito and have loved them. First I had the MM-1 (moving magnet, no longer in production) which sold for $500 and then I moved up to the MC-One Special (list $1350 but sometimes for sale used). Both sounded great on my Linn and worked very well.