I have no experience pertaining to ARC so I can not comment there but I have a CJ MF2500a and it is very detailed,fast and musical. I do not know what bass slamm is that Tabu mentions. But I do know that the MF2500 drives my Thiels quite easily and rattles the windows in my house when the digital cannons fire while playing Tchaikovsky's 1812 overture.
Chuck
Chuck