In that size range, I'd buy one of the new AJ Lasers. They are really remarkable performers able to 3D or precision well enough you could fly entry level Pattern or IMAC. The CS out of the company is outstanding as well and they can offer advice about setups for particular models.

I have several Extra's and the Laser fly's better than any of the ones I've had or have now.

http://www.aj-aircraft.com/

If you're dead set on a 300 Extra, go checkout Extreme Flight.