When you're new, it's not really what kit you have. Keeping it between the lanes is more important than how much you spend.
But, you start of with a better kit and it will grow with you a little more. If you plan on becoming a racer, spend a little more money and get the better stuff. You don't need the best of everything though. Spend money on good RC tools, and spend as much as you have to spend to find a radio that's comfortable in YOUR hands. Don't let anyone tell you X radio is better than Y radio. If it's not comfortable to hold, it's a valuable as a warm squishy plastic bag of runny dog crap.