I have used the HiTec flight packs for quite awhile now. While there are folks that will say they are no good, I have had absolutely no problems with mine (well, I did strip the gears in one servo - my fault though ).

I can usually get a HiTec pack (7 channel switchable receiver, 4 standard servos, switch harness and 600 mah battery ) for $90. When they are on sale I have gotten them as low as $75.