I heard something like ASIC miners and people recommend it more
Actually what is that?
As i am new to the mining scene can some1 please explain a little about this so called thing
Application Specific Integrated Circuit.
They're built to do one thing, and they do it fast and well. It's essentially the Ferrari of the Bitcoin mining industry.
http://en.wikipedia.org/wiki/Application-specific_integrated_circuitIt means i can buy them readymade rather that building my own rig is it?
Did you read even the first sentence of the Wiki article?
The term ASIC has nothing to do with your ability to buy it. But in a sense, yes, you're right -- you
have to buy them ready made unless you want to throw down a few million to produce an ASIC chip that does what you want it to do.