My 12 year old found a Redline BMX bike (purple, including wheels). He hasn't shown an interest in bicycles before, but loves this bike. It's $450 so I am a thinking he wants it to show off to his friends and not really ride it. He needs a mountain bike for Boy Scouts but still wants to spend his money on the purple one. Can anyone help me out with the best brands of bikes. I have no idea. I thought I could get a mountain bike for my 9 year old and they could share...then we would have all the wheels covered...any suggestions.