Posted by: Ninjatarian
I mentioned it in another thread, but I am quite a fan of e13s cassettes. The 9 tooth cog gives them as much or more range than any other option and they are light weight to boot. The other plus is you can run a smaller chain ring (due to the 9 tooth) which increases roll over, reduces weight, and shortens the chain.
GX is nice for the price and I wouldn't rip it off if it came stock, but I just think there are other more enticing options if you were to build from scratch.
Fair - so would you go full custom, or...?
Something tempting me is to combine an XT rear mech with a Box shifter and that E13 cassette (plus maybe RF cranks etc)...