This question comes up all the time. Remember, you get what you pay for. If you buy one of the $30 rod sets, that is what you will get. Everyone on the forum will have a different opinion. Personally, I like rods in the $150 - $200 range. You will get a good quality rod with a lifetime warranty. Yes, you can spend $600 or more for a rod and you will get an awesome rod, but that is not what I am in it for. If I was a pro, or did it for a living, I would probably spend the $$$ for a top quality rod.
Don't forget you need a reel, line, and all the other fun toys.