The "Ape" will eat budget chains, quite simply DONT fit a budget chain.
Theres 3 maybe 4 things that you should never scrimp on, and quality chains/sprockets is one of them.
I have a Renthal chain on mine, lube it every 3 to 4 rides and in 2000 miles it hasnt stretched at all.
The only down side to the Tsubaki/Renthal chains is they dont have a "soft" link, you will need something link a "Whale" tool (oooh err) to set the link.