What dirtbike brand and model would be good for me as a beginner?

I am 5'10 and weigh about 125 lbs., I have rode ATV's all my life and want to start riding dirt bikes. What would you recommend? I just want to trail ride and not race or anything right now. Also, what could I expect to pay? I definitely want to buy brand new, so give me an average price I would expect to pay. Try to keep the bike somewhat inexpensive. Please only answer if you have experience. Thanks!