Your question has a few inconsistencies. A bike with a light on the front would indicate that you want a trail bike. A trail bike isnt designed for jumping 10-40 ft gaps and tabletops. You can get a new bike for $3-$4K, but most likely not one that will fit someone of your height and keep up with 800cc 4 wheelers. You need to decide which route you want to go...trail or track...there is no one bike that will do both flawlessly. Fill out the sticky at the top of the forum page.