I've tweaked and replaced leaving the ProAc's in place. Now I'm using a Tortuga Audio LDR V3 pre amp I built from a kit. A used Odyssey Khartago + power amp. A new Oppo UDP-205 player. Cables are Duelund 20ga SE IC's that I made along with Duelund 16ga speaker wire.
Everything is a huge upgrade and the ProAc's are loving the additional power the Odyssey brings.