You meant 2m max head pressure (which translates to around 6.5 feet), which is 4.4 psi max pressure. That is considered weak for a pump...
"enough" is different for everyone. If you think its enough then fine. If you absolutely feel that you need 2 loops with 2 ddc+ with petra's top or even 4 loops with 1-2 RD30s each (someone on XS actually is planning something of that magnitude...), then that's you.
Black Ice Xtreme isn't as good as MCR or Coolrad...wtv you already got it. Well good luck.