sprocket and chain kits?

I want to know a good chain/sprocket kit for a 400ex that will last awhile, and that won't cost a arm and a leg. I was lookin at renthal but there kinda expensive for me, is there a kit with the same quality for less??? O-Ring or Standard chain???

How many teeth on the front and back tooth do you guys recommend for trail riding, open country riding, and the odd weekend race here and there.

2001 400ex
T4 slip- on
K&N power-kit
Wiseco High compression piston
20 inch razr's on the back

its not that hard of a post is it???

[schism_rhs]

Sidewinder Chain and Sprockets are supposed to be really good, I don't know about how much they cost though ?!?!

[RideRed400EX]

When it comes to chains/sprockets you get what you pay for. I still have stock rear and a renthal from on my 400 but I'm going with sidewinder when they wear out. Had great luck with them in the past.