Elite > Intellect > Tenergy.
Elite cells, well, I don't know what to say, I owned a small 9.6v pack, and I was so impressed with it. I loved that pack while I still had it. I have a 3300mAh Large 9.6v Tenergy in a stock CYMA M14, and my friends Elite 3600mAh 8.4v battery pulls a guarder sp120 faster than my Tenergy does with a stock spring. Elites are the stuff.
Intellects are good too, but still not quite with elites in my book.