A few of these are worth considering, not too expensive. If you don't have a Local Hobby Shop, try online at places like A Main Hobbies or Carolinas RC, hell even Tower has good deals from time to time!
Trinity Komodo Dragon (standard or Pro depending on budget)
Checkpoint Money 19 Turn Spec
Orion Element 19 Turn
Associatesd Challenger 19 Turn Spec
These are competitive motors so will give you some good power. A bit more money than your average motor, but still cheaper than Mods and a LOT cheaper than brushless which no doubt someone will mention