Derailor help

So I'm looking at upgrading to a nicer rear derailor and I wanna know if I will see a huge difference between sram's x.9 and x.0 series. I do a lot of XC so I need something that can stand up too a beating and hold up too mud and rain. But is the x.0 really worth the extra 100 bucks? On amazon I can pick up a x.9 for about $80 and a x.0 for like $190. Whats your guy's opinions?

X.9

X.0

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Permalink Reply by Matt M. 18.5KM on October 6, 2009 at 3:13pm

BLACKSPIRE = F**K YEAH!!!!!!!!!!!!!!!!!!!!!!! THAT IS SOME BADASS DOWNHILL MTB SHIT!!!!!!

nik was here said:

they both work great... the question now is, how good do you want it to look?

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Permalink Reply by nik was here on October 6, 2009 at 4:50pm

they retail stock for around $175. This one has a Blackspire MonoVeloce chain ring and C4 bash guard.
very stiff, light and look great. only thing it needs now is a Chris King BB.
disclaimer: I work in a shop.

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Permalink Reply by nik was here on October 6, 2009 at 5:48pm

They have no flex compared to traditionally forged cranks, the benefits of carbon with extra durability. Give them a try. And remember, they were designed in Chicago!
I'm thinking about getting a sliver set for my new SS.