Reply to About Audio/interface and Monitors

Hello everyone!

Im a dnb producer and im going deep and deep everyday inside the world of music production.
But now i'm facing some problems on hardware/software, and i want to ask here some tips.

1. About Audio card or interface.

1.1 Do i need an external audiocard for my macbook pro?
Im producing with the built in audiocard of the mac, but someone told me that with an external audiocard i will have a cleaner and better sound, and i will hear some frequencies on the monitors that i cant hear with the built in.

It is true?

If yes, which kind of audiocard do i need? Dj audiocards are not for producers, exactly?
Is the Macbook pro Built in audio card enough?

1.2 If i'm using a pc tower, can i use a pci audiocard? it is enough the audiocard built in on my motherboard Asus?

1.3 I'm facing some overload with multiple Massive and drum racks on Ableton. 8.1
An external audiocard on my macbook pro will help the processor in anyway?

If yes, which kind of audiocard or interface do i need?

Sorry for all the questions but there are a lot of products on the net called "audiocards" and dont know which i need for produce music with a DAW, and if i need one at all.


2. About Monitors.

Someone suggested me to buy monitor with at least 5" sub, because i need all the frequences possible for produce good drum and bass.

It is true?
If yes which are the cheapest monitor i can buy (but good enough for produce good music)?
He suggested me krk rookit 5 has the entry level, saying to me that everything else behind is crap. What about Alesis M1 Active 520?
Esi near08?

thanks for all the advice.