Best Magneplanars Ever!?

Would a factory reconditioned set of Magneplanar Tympani's offer any benefits over their new, single panel speakers? As discussed in related posts, I would also be very grateful for additional opinions regarding the 3.5 vs. the MG-20. Thank you to everyone for opinions on tubes vs solid state but has anyone tried bi-amping, especially with solid state low end and tubes for mids? Best Wishes.