Welcome to the forum.
The stock, kit supplied carburetor is not a bad little guy. I've read several accounts of people replacing it with so called 'high performance' or 'racing' carbs only to go back to the stock one.
Like every other aspect of this hobby there'll be differences of opinion so stand by, you'll get lots of input soon. Meanwhile, try using the search feature at the top of the page. Type in 'carburetor' then sit back because you'll find plenty to read on the subject.
Tom