a good secondary adnetwork to use

hi am using adsense as main adnetwork and i never find any other adnetwork better than adsense, i need to use a secondary adnetwork in adsense and am looking for contextual adnetwork. can someone pls give some suggestion.
adbrite – they never have ads to show, always showing there own adv & less payout.
bidvertiser – i used it and i think itz a scam.
chitika – i think they need only us traffic.
admaya – currently am using, still w8 for payment, am feared they r also scam, tht y am looking for new one. if they pay then i will post here.
some of the networks i found is
clicksor, contextweb, vibrantmedia
pls give ur opinions.. my site is a video sharing network with nearly 19k unique daily

See original post by nandanamnidheesh