Don't know your motor combo.
The GP Spectra is the same plane as the Spirit but with a motor.
Spectra
http://www2.towerhobbies.com/cgi-bin...&I=LXADK2&P=ML
T-601 Electrifly motor, folding Prop,
SPECS: Wingspan: 78.5" (1995mm) Wing loading: 10.6 oz/sq ft (32g/sq dm2)
Wing Area: 676 sq in (43.6sq dm2) Weight: 3.1 lb (140g)
If you want to do a Speed 600 type set-up, here are some packages:
These would be packages that use the same components but include various gear boxes. The spectra comes direct drive. I would recommend a geared option with a bigger prop.
Great Planes ElectriFly T-600GD System w/Gear Drive
http://www2.towerhobbies.com/cgi-bin...?&I=LXUB34&P=7
Great Planes ElectriFly T-600GD ESC System w/Gear Drive
http://www2.towerhobbies.com/cgi-bin...?&I=LXUB35&P=7
Great Planes ElectriFly S-600GD System w/Gear Drive and two gear radios
http://www2.towerhobbies.com/cgi-bin...?&I=LXBRN3&P=7