Couplers: Bachmann 24130 Amtrak Spectrum ACELA Set

[choochootrains]

What are the couplers on the Bachmann N 24130 Spectrum Acela set? If not magnetic, what Micro Trains magnetic couplers and/or wheel sets are needed to convert the locomotive and cars? Can you change the couplers(springs) real easily or would it be best for a novice to buy the complete replacement wheel sets?