Amp current - how much high current to go for

Hi All,

        Some of you may remember me from a while back talking about my NuPrime IDA-8.   After three months of break in and a fat ass Silnote power cord it's significantly better but still not where I need it to be to drive my pair of Kudos C2.   I think it's time to move on to a better high current amp.  My question is, how much current do I need to go for.  For example, I've been eyeing

Parasound Halo Integrated - 45 amperes max

NAD M3 - 50 amperes max

Parasound Halo A21 - 60 amperes max

B&K EX-440 (vintage) - 70 amperes max

Mark Levinson No331 - ? amp max

Thank you ahead for the education.

P.S.  I missed out on a deal with Cullen's Cable or else would've got with Patrick instead of Silnote.  Patrick is really a nice guy, highly recommend talking to him if anyone is interested in a power cable.