Hi,
For a much cheaper alternative to Hacker have a look at the Mega 16/15/x series. I'd guess that a /6 or a /7 flown without a gearbox would really liven up your plane! Other alternatives are the Astro 010 (but you need more than 7/8 cells usually) or how about the Model Motors Mini AC range? Then just befoer Christmas the MP Jet brushless+gearbox appeared and they'r just FIFTY (yes, fifty!!) dollars for the motor and the gearbox together.
If I were you I'd have a look at
this page
Cliff