Orion and Trinity make good motors, both stock and mod. You can visit their sites.
What are you planning to do, racing or bashing? For bashing, get a fast one.
For racing, I highly recommend you start out with a stocker. Stock class usually have most people into it, meaning more fun. Besides, there's much more into racing, than pure power, so start out with something that is easier to control.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250