Ya did fine.
205 watts is adequate for a 3 pound plane. Many people would target about 100 watts/pound but your set-up will be about 70/pound and that if fine.
For the set-up you have selected you would want a 3S lipo pack, 11.1V of at least 2000 mah and at least 15C rating. rating.
You should find this free book helpful:
http://www.rcuniverse.com/forum/elec...ic-flight.html