+1 for lambas in silver!
They don't add much to the q-factor, and I find they make my HTII mtb cranks feel like a set of HTII road cranks with mtb flat pedal - if that makes any sense.
In short, if you feel like your q-factor is too wide, you might benefit from a pair of lambas.
I cant bring myself to buy these sorry, I'm sure they're great but...