Edited Date/Time:
So I've been into bikes since I was really little, about 7. Started with a Mongoose 20" from walmart, then got a NEXT Chaos (green) from walmart. Recntly I got a used Giant Method 24" but the cranks came off of the axle in the bottom bracket a bit and the sprocket got offset from it's little post it sat on which started to oval out the hole so now my chain gets tight, then loose, then tight. Plus the rear nuts are all jacked up, I got a bent spoke on the front tire, both tires are worn down. Anyways, it's 4 years old ish. My 17th birthday is in 3 weeks and I got 500 dollars to get a new bike and want to get more into BMX... I still have no idea how to do a wheelie, but I love riding bikes and doing jumps. Only problem is I'm about 240 lbs (Was 280 before summer) and 5' 10" - 5' 11" been biking a lot. I would be very greatful if I could get some help on finding a bike that'll hold up, I do a lot of riding around town going as fast as possible so I push on the cranks / pedals a lot. I love the feeling of acceleration and jumping. I just don't want my cranks to creak on me.
Anyone willing to work with me to help me find something? 
Preferring 20-24" BMX, otherwise I was looking at the Giant Revel 1 2013 model mountain bike. Also, I am very sorry if I didn't post this in the right section, never joined a BMX forum before.
