sanyo HR-SC 2600mah nimh 10-cell for all of the below (zapped of course). Below prices are motor/esc combo costs with average street prices

budget setup with good prformance, about $75
Endo, 4.6, 12X8 prop

More expensive, far better performance $190
Mega 22/20/2 4.0 ratio with 14X7 , hacker 40-3P master controller

"ferrari" setup, about $270
Hacker C40 12T, 5.0, 14X7,hacker 40-3P master controller

Various components and cost
Endo, $25
C50 ESC, $50
Mega 22/20/2 $90
hacker master 40-3P controller $100
Hacker C40 12T motor $170