2009 Force, 2010 Rival or 2010 Force Shifters ?

Brocade

Need shifters for a a custom titanium frame. It's gotta be SRAM. What do I get ?
- is Force 2010 much better than 2009 Force ?
- is 2009 Force better than 2010 Rival ?

Would I ever consider Red ?

Thanks all

bendertherobot

SRAM Red right hand has zero loss. Force doesn't.

Fudge have the SRAM red shifters at only £30 more than Force.

My view? I reckon Force 2010 is the equal of Red.