LSA Signature to Statement upgrade

Hey all,

I have the LSA Signature integrated and am thinking of sending it off to Brian Wolford at LSA for the Statement upgrade. Has anyone done this and is there a difference in sound and presence to justify the upgrade cost?

or, has anyone heard both the Signature and the Statement and can attest to the difference in sound?

I'm driving a pair of Reference 3A de Capo i's.

Thank you much,

s