Magnepan MMG Upgrades

I posted a question on the Red Fuse thread about MMG upgrades and some folks kindly responded with great suggestions. Instead of hijacking that thread, I figured I'll ask a more specific question here from the MMG owners about which upgrades made the most sonic differences. I'd also like to hear any other comments that might help a new Magnepan owner. The speakers already have Sound Anchor stands so I am primarily curious about other changes that folks made with good results.

Thanks.